The radius of a spherical ball is increasing at a rate of 2 cm/min. At what rate is the surface area of the ball increasing when the radius is 8 cm? Suppose y = v(2x + 1) (the squareroot of 2x + 1) where x and y are functions of t. If dx/dt = 3, find dy/dt when x = 4

Answers

Answer 1

The surface area of the ball increasing when the radius is 8 cm is 6cm³/sec.

The area of ​​a solid object is a measure of the total area occupied by the surfaces of the object. In the presence of curved surfaces, the mathematical definition of the surface area is much more complex than that of the arc length of a one-dimensional curve, or the surface area of ​​a polyhedron (c' that is, of an object with flat polygon faces), where the area is the sum of its horizontal areas. Smooth surfaces such as spheres are mapped onto the surface using its notation as a parametric surface.

Let r,V and S be respectively the radius, volume and surface area of the spherical balloon at time t.

∴V = 4/3 πr³

and S = 4πr²

Rate of change of surface area with respect to t

⇒ dS/dt =2

⇒ d/dt (4πr²) = 2

⇒ 8πr dr/dt = 24

⇒ dr/dt = 1/ 4πr ------------------- (1)

Rate of change of volume of the balloon with respect to t

= dV/ dt

= dtd ( 4/3 πr³ )

= 4/3 π⋅3r²

= 4πr² ⋅ dr/ dt

​= 4πr² ⋅ 1/ 4πr ------------------ [From (i)]

= r

= 6

Hence, the volume of the spherical balloon is increasing at the rate of

6 cm³ /sec.

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Related Questions

Write the equation of the line in fully simplified slope-intercept form.

Write the equation of the line in fully simplified slope-intercept form.

Answers

(0,-7) (5,-6)

m=-6-7/5-0= -13/5

Y=mx+b (0,-7)
X, y
-7=-13/5(0)+b
-7= 0+b
0=0
-7=b

Answer: y=-13/5x-7

show that a subset of an antisymmetric relation is also antisymmetric.

Answers

A subset of an antisymmetric relation is also antisymmetric.To show that a subset of an antisymmetric relation is also antisymmetric, consider the following steps:

Let R be an antisymmetric relation on a set A, and let S be a subset of R. By definition, R is antisymmetric if for all (x, y) ∈ R, if (x, y) ∈ R and (y, x) ∈ R, then x = y. Now, we need to prove that S is antisymmetric as well. Let (x, y) ∈ S.
Since S is a subset of R, (x, y) ∈ R.

Assume (y, x) ∈ S. As S is a subset of R, (y, x) ∈ R.As R is antisymmetric, we know that if (x, y) ∈ R and (y, x) ∈ R, then x = y. Therefore, if (x, y) ∈ S and (y, x) ∈ S, then x = y.So, a subset of an antisymmetric relation is also antisymmetric.

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3(q - 7) = 27

Solve for q

Answers

Answer:

3(q-7)=27

3q-21=27

3q=48

q=16

Step-by-step explanation:

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Answer:

q = 16

Step-by-step explanation:

3(q - 7) = 27

3q - 21 = 27    | +21

3q = 48          | :3

q = 16

Calculate the following dosage. Do not write the units in the answer. Round the number to the nearest tenth.

Order: Famotidine 40 mg IV daily

Available: Famotidine 20 mg/2 mL

____mL

Answers

The required volume of Famotidine is 4 mL.

To calculate the required volume in milliliters (mL) for the provided dosage of Famotidine, we can use the following formula:

Volume (mL) = (Dosage ordered / Available dosage) * Volume per dose

We have:

Dosage ordered = 40 mg

Available dosage = 20 mg/2 mL (This means there are 20 mg of Famotidine in 2 mL)

Volume per dose = 2 mL

Let's substitute these values into the formula:

Volume (mL) = (40 mg / 20 mg) * 2 mL

Simplifying the expression:

Volume (mL) = 2 * 2 mL

Volume (mL) = 4 mL

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PLEASE HELP ME ASAP THESE ARE CONFUSING

PLEASE HELP ME ASAP THESE ARE CONFUSING

Answers

Answer: the answer is B-130

Explanation: it is farther closest to 50 than the other options.

Policies Current Attempt in Progress On May 1, 2021, Sheffield Company sells office furniture for $300000 cash. The office furniture originally cost $746800 when purchased on January 1, 2014. Depreciation is recorded by the straight-line method over 10 years with a salvage value of $80200. What gain should be recognized on the sale? (Hint: Use 7.333333 for years used in calculation.) O $44540. O $22220. O $84080. O $42040. Save for Later -/5 = 1 Attempts: 0 of 1 used Submit Answer

Answers

To calculate the gain on the sale of the office furniture, we need to determine the asset's book value and compare it to the sale price.

First, let's calculate the accumulated depreciation on the furniture. The furniture was purchased on January 1, 2014, and the straight-line depreciation method is used over 10 years with a salvage value of $80,200.

Depreciation per year = (Cost - Salvage Value) / Useful Life

Depreciation per year = ($746,800 - $80,200) / 10 years

Depreciation per year = $66,160

Next, we need to calculate the accumulated depreciation for the period from January 1, 2014, to May 1, 2021 (the date of the sale). This is approximately 7.33 years.

Accumulated Depreciation = Depreciation per year × Years

Accumulated Depreciation = $66,160 × 7.33 years

Accumulated Depreciation = $484,444.80

Now, we can calculate the book value of the furniture:

Book Value = Cost - Accumulated Depreciation

Book Value = $746,800 - $484,444.80

Book Value = $262,355.20

Finally, we can calculate the gain on the sale:

Gain on Sale = Sale Price - Book Value

Gain on Sale = $300,000 - $262,355.20

Gain on Sale = $37,644.80

Therefore, the gain that should be recognized on the sale of the office furniture is approximately $37,644.80.

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The gain that should be recognized on the sale of the office furniture is $84,080.

The gain is calculated by subtracting the equipment's book value from the sale price. This gain will be reported on the company's income statement. Here is how to calculate the gain:First, find the equipment's book value using the straight-line method of depreciation.

Straight-line depreciation is calculated by taking the difference between the equipment's original cost and its salvage value, and then dividing it by the number of years the equipment is used. The annual depreciation expense is then multiplied by the number of years the equipment is used to find the equipment's book value at the end of its useful life.

For this question, the book value of the equipment at the time of sale is:Cost of equipment: $746,800Salvage value: $80,200Depreciable cost: $746,800 - $80,200 = $666,600Annual depreciation: $666,600 ÷ 10 years = $66,660Book value at the end of 2020: $666,600 - ($66,660 x 7) = $156,420

Next, subtract the equipment's book value from the sale price to find the gain:Sale price: $300,000Book value: $156,420Gain: $143,580Finally, round the gain to the nearest dollar:$143,580 ≈ $143,580.00So the gain that should be recognized on the sale of the office furniture is $84,080.

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find the missing points

find the missing points

Answers

Step-by-step explanation:

don't know its so hard.....

but in my guess its answer should be 1,1,3,4

otherwise ask your teacher

Can some one help me with this urgent?
Hotel Nights Price (in dollars)
A 3 192
B 5 300
C 7 455
Which hotel costs the least per night?

Answers

B costs the less because 300 divided by 5 equals $60 while A costs $64 and C costs $65

An empty shipping box has a mass of 2. 75 kilograms. An electronics store is packing 5 identical laptops in the shipping box. Each laptop has a mass of 1. 65 kg. The cost to ship the box was $40. 00 for the first 5 kg and $3. 15 for each kilogram over 5 kg. What was the cost to ship the packed box?

Answers

The cost to ship a box containing 5 laptops, weighing a total of 11 kg (including the empty box), is $58.90, with a cost of $40.00 for the first 5 kg and $3.15 for each additional kilogram.

The total mass of the packed shipping box can be found by adding the mass of the laptops (5 * 1.65 kg = 8.25 kg) to the mass of the empty box (2.75 kg) for a total mass of 11 kg.

Since the cost to ship the box is $40.00 for the first 5 kg and $3.15 for each additional kilogram over 5 kg, we can split the total mass into two parts: the first 5 kg and the additional weight above 5 kg.

The cost to ship the first 5 kg is $40.00, and the remaining weight is 11 kg - 5 kg = 6 kg.

The cost to ship the additional 6 kg is $3.15 per kilogram, so the total cost to ship the packed box is:

$40.00 + $3.15 * 6 kg = $58.90

Therefore, the cost to ship the packed box is $58.90.

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10. Which expression is equivalent to t+4+3-2.2t?
A 1.2t+7
B-1.2t+7
5.8t
D 10.2t

Answers

Answer: B

Step-by-step explanation:t+4+3−2.2t

Add 4 and 3 to get 7.

t+7−2.2t

Combine t and −2.2t to get −1.2t.

−1.2t+7

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ANYWAYS MY QUESTION IS.

What's 10 divide by 5

Answers

Nice

thx for the points  

I like your face

the diameter of the raw cookie is 21/2 inches after baking the cookie, the diameter is 5 1/2 inches . by what factor does the cookie expand

Answers

Cookie expanded by scale factor 2.2 after baking.

What is scale factor?

The size by which the shape is enlarged or reduced is called as its scale factor. It is used when we need to increase the size of a 2D shape, such as circle, triangle, square, rectangle, etc.

Given,

Diameter of raw cookie = 2 1/2 = 5/2 inches

Diameter of baked cookie = 5 1/2 = 11/2 inches

Scale factor of baked cookie to raw cookie

= 11/2/5/2

= 2.2

Hence, by 2.2 scale factor, cookie expanded after baking.

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Solve the equation and enter the value of x below.
7x + (-2) = -44
X =

Answers

7x - 2 = - 44

7x - 2 + 2 = - 44 + 2

7x = - 42

x = -42/7

x = -6

check

7 * (-6) + (-2) = - 42 - 2 = - 44

Answer:

7x+ (-2)=-44

x= -6

Step-by-step explanation:

you're welcome

John sold one more than twice as many candy bars as Linda sold. If together they sold 43 candy bars, how many did John sell?

Answers

Answer:

Step-by-step explanation:

Linda sold 14

John sold 29 which is 14 two times plus one

29+14=43

find the mean and median and made of the following data 30,31,35,29,32,30,31,35,36,35​

Answers

mean- 32.4
median- 31.5
mode- 35

Answer:

mean- 32.4

median- 31.5

mode- 35

Step-by-step explanation:

to find mean add up all the number together than divide it by how many number that are there

for example the total is 324 and you would divide it by 10 (since there are 10 number there)

to find median locate the middle number but since you have two number in the middle take those to number add them together and divide by 2

for example 31+32=63 than divide by 2 which is 31.5

to find mode it is the number that appears most often so it would be 35 since it appears most often

I need help wit this question yall !!

I need help wit this question yall !!

Answers

Answer: 50

Step-by-step explanation: 50 trust i did lesson

7. Simplify the answer to the equation. 3k + 4 + 2k +5​

Answers

Answer:

5k + 9

Step-by-step explanation:

3k + 4 + 2k + 5 =

= 5k + 9

Answer: 5k+9
Add like terms
3k+2k=5k
5+4=9
therefore the answer is 5k+9

Create an equation that describes the greatest horizontal length, H, in
terms of the greatest vertical length, V.

Answers

The equation that describes the greatest horizontal length, H, in terms of the greatest vertical length, V, is \(H = \sqrt{ (V^2 + D^2)}\)

To create an equation that describes the greatest horizontal length, H, in terms of the greatest vertical length, V, we can use basic geometry principles.

Let's consider a right-angled triangle where V represents the vertical length and H represents the horizontal length. The hypotenuse of the triangle will be the greatest diagonal length.

According to the Pythagorean theorem, the square of the hypotenuse is equal to the sum of the squares of the other two sides. In this case, the hypotenuse represents the greatest diagonal length.

Using the Pythagorean theorem, we can write the equation as:

\(H^2 = V^2 + D^2\)

Where H is the greatest horizontal length, V is the greatest vertical length, and D is the diagonal length (hypotenuse).

Since we are interested in expressing H in terms of V, we need to isolate H in the equation. Taking the square root of both sides gives us:

\(H = \sqrt{(V^2 + D^2)}\)

Therefore, the equation that describes the greatest horizontal length, H, in terms of the greatest vertical length, V, is:

\(H = \sqrt{ (V^2 + D^2)}\)

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g(x) = (-2x + 6) (4x - 14)

Answers

Answer:

i need the points sorry

Step-by-step explanation:

Answer:

g=−8x^2+52x−84/x

Step-by-step explanation:

Divide both sides by x

How many millimeters are in 9.8 hL

Answers

Answer:

980,000 hl

Step-by-step explanation:

There are 980,000 milliliters in 9.8 hectoliters.


Simplify the radical expression

Simplify the radical expression

Answers

Answer:

6x

Step-by-step explanation:

\( \sqrt{36 {x}^{2} } = \sqrt{36} \times \sqrt{ {x}^{2} } \)

Square of 36 is 6. Square of x^2is x.

\(6x\)

James was a visitor on an animal-spotting trip. The
probabilities of a visitor seeing crocodiles and hippos on
the trip are given in the tree diagram below.
Given that James saw exactly one of these types of
animal, what is the probability that he saw a crocodile?
Give your answer as a fraction in its simplest form.
Saw a crocodile
Yes
No
Saw a hippo
5/60
16
Na
79
Yes
No
Yes
N

James was a visitor on an animal-spotting trip. Theprobabilities of a visitor seeing crocodiles and hippos

Answers

Given that James saw exactly one of these types of animal, the probability that he saw a crocodile is given as follows:

1/3.

How to calculate a probability?

The parameters that are needed to calculate a probability are listed as follows:

Number of desired outcomes in the context of a problem or experiment.Number of total outcomes in the context of a problem or experiment.

Then the probability is calculated as the division of the number of desired outcomes by the number of total outcomes.

The probability of seeing exactly one type of animal is given as follows:

2/5 x 1/6 + 3/5 x 2/9 = 1/15 + 6/45 = 3/45 + 6/45 = 9/45.

The probability of seeing exactly one type of animal and being a crocodile is given as follows:

2/5 x 1/6 = 1/15 = 3/45.

Hence the conditional probability is given as follow:

(3/45)/(9/45) = 3/9 = 1/3.

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Find the coordinates of c

Find the coordinates of c

Answers

Answer:

Step-by-step explanation:

(x - 9)/2 = 4

x - 9 = 8

x = 17

(y - 5)/2 = 1

y - 5 = 2

y = 7

(17, 7) for coordinates of C

Need help as asap emergency

Need help as asap emergency

Answers

Answer:

$1346.4

Step-by-step explanation:

First find the rectangle portions area with lxwxh, which is 8x6x8. That equalls 384.

Then find the triangles, which is bxh, which is 6x8. That equals 144.

Add those two to get 528.

Then multiply the total area by 2.55 which will get you 1346.4

\(\bold{ANSWER:}\)
$1346.4

\(\bold{SOLUTION:}\)
Need help as asap emergency

Using Pythagoras' theorem, calculate the length of YZ. Give your answer in centimetres (cm) to 1 d.p. 5 cm 19 cm​

Answers

Answer:

We can use Pythagoras' theorem to find the length of YZ, which states that in a right triangle, the square of the length of the hypotenuse (the side opposite the right angle) is equal to the sum of the squares of the other two sides.

In this case, YZ is the hypotenuse, and the other two sides are 5 cm and 19 cm. So we have:

YZ^2 = 5^2 + 19^2

YZ^2 = 25 + 361

YZ^2 = 386

YZ = √386

YZ ≈ 19.6 cm (to 1 decimal place)

Therefore, the length of YZ is approximately 19.6 cm.

If f(x) = (x + 9 and g(x) = --6, which describes the range of (f + g)(x)?
O (f+g)(x) 3 for all values of x

Answers

Given:

Consider the below figure attached with this question.

To find:

The value of \((f+g)(x)\).

Solution:

The given functions are:

\(f(x)=|x|+9\)

\(g(x)=-6\)

Now,

\((f+g)(x)=f(x)+g(x)\)

\((f+g)(x)=|x|+9+(-6)\)

\((f+g)(x)=|x|+9-6\)

\((f+g)(x)=|x|+3\)

We know that,

\(|x|\geq 0\)

Adding 3 on both sides, we get

\(|x|+3\geq 0+3\)

\((f+g)(x)\geq 3\)

So, \((f+g)(x)\geq 3\) for all values of x.

Hence, the correct option is A.

If f(x) = (x + 9 and g(x) = --6, which describes the range of (f + g)(x)?O (f+g)(x) 3 for all values

two stars (a and b) have the same declination. star a has a right ascension of 5h while star b has a right ascension of 2h. which star rises first?

Answers

Answer:

Step-by-step explanation:

The rising time of a star depends on its right ascension and the latitude of the observer.

In this case, since both stars have the same declination, their altitude above the horizon at any given time will be the same. Therefore, the star with the smaller right ascension will rise first.

Since star A has a right ascension of 5h and star B has a right ascension of 2h, star B will rise first. This is because the Earth rotates from west to east, causing the stars to appear to move from east to west in the sky. As a result, stars with smaller right ascensions will appear to rise earlier in the east than those with larger right ascensions.

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Simplify the expression $17x-24x+13x$. Your answer should have the variable $x$ in it only once.

Answers

Answer:

1

Step-by-step explanation:

1+1=2

Click below for more info

Simplify the expression $17x-24x+13x$. Your answer should have the variable $x$ in it only once.

Solve for x. Round your answer to the nearest tenth and type it in the blank without units.

Solve for x. Round your answer to the nearest tenth and type it in the blank without units.

Answers

The opposite side of the right triangle (x) is approximately 6.888 inches long.

Right angle triangle

To solve this problem, we can use the trigonometric ratio for the sine function, which is opposite/hypotenuse. We have the hypotenuse as 12 inches and the opposite angle as 35 degrees, so we can set up the equation:

sin(35) = opposite/12

To solve for the opposite, we can multiply both sides by 12:

opposite = 12 * sin(35)

sin(35) as approximately 0.574:

opposite = 12 * 0.574

opposite ≈ 6.888

Therefore, the opposite side of the right triangle (x) is approximately 6.888 inches long.

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Caroline is trying to earn money to pay for her field trip by doing odd jobs around the house. She needs to raise more than $35 to be able to pay for the field trip. Which inequality represents how much money she needs to earn?

Answers

The inequality representing the money Caroline needs to earn is \(x > 35\)

An inequality is a statement of relation that compares two unequal quantities.

Considering the given information, we have the following two statements to compare using inequality:

Money she will need to work for to pay for the trip, can be represented as \(x\)The minimum amount she needs to earn to pay for the trip, more than $35

The equality sign we are going to use to compare the two statements is greater than, >.

The relation in inequality will be written as:

\(x > 35\)

This means that, the amount of money she will earn, x, will be greater than $35.

Therefore, the inequality that represents what Caroline must earn is x > 35.

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