Joelle would like to tip her hairdresser 20%. If her haircut costs $38.00, which expression should she use to find the tip amount?
(0.02) (38)
(0.2) (38)
(1.2) (38)
(20) (38)

Answer:

what I think the answer is ×=-9

Answer:

\(x\) = 19

Answer:

Regular pentagon

Solve for perimeter

P=25cm

a Side

5

cm

The ratio of their areas is (3:8)² which simplifies to 9:64.

Area of smaller circle is 256/9 π.

The ratio of their perimeters is 5:3 since they are regular polygons with proportional side lengths.

The ratio of the areas of two similar polygons is equal to the square of the ratio of their corresponding sides. Since the scale factor of the polygons is 3:8, the ratio of their corresponding sides is 3:8. Therefore, the ratio of their areas is (3:8)^2, which simplifies to 9:64.

The area of a circle is proportional to the square of its radius. Let r be the radius of the smaller circle, then the radius of the larger circle is 3/2 times r. The area of the larger circle is given as 64π, so (3/2)^2 times the area of the smaller circle must also equal 64π. Solving for the area of the smaller circle, we get:

(9/4)πr^2 = 64π

r^2 = (64/9) * (4/π)

r^2 = 256/9π

Area of smaller circle = πr^2 = π * (256/9π) = 256/9 π.

The ratio of the areas of two regular polygons is equal to the square of the ratio of their side lengths. Let s1 and s2 be the side lengths of the first and second pentagons, respectively. Then we have:

Area of first pentagon / Area of second pentagon = (s1^2 / s2^2)

We are given the areas of the two pentagons, so we can plug them in and simplify:

150√3 / 54√3 = (s1² / s2²)

25 / 9 = (s1^2 / s2^2)

s1 / s2 = √(25/9) = 5/3

Therefore, the ratio of their perimeters is 5:3 since they are regular polygons with proportional side lengths.

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a) The given function is f(x) = x⁴ − 2x² + 3. We can find the local maxima and minima of the function using its first derivative

:f(x) = x⁴ − 2x² + 3f'(x) = 4x³ − 4xIf f'(x) = 0, then x = 0 or x = ±1.

The critical values of f(x) are −1, 0, and 1.Therefore, the function has local maxima at x = ±1 and a local minimum at x = 0.b) We need to find the intervals of concavity and the inflection point of the given function.

To find the concavity, we will use the second derivative

:f(x) = x⁴ − 2x² + 3f'(x) = 4x³ − 4xf''(x) = 12x² − 4If f''(x) = 0, then x = ±sqrt(3/2).The critical values of f''(x) are −sqrt(3/2) and sqrt(3/2).

Therefore, the function is concave upward on the intervals (−∞, −sqrt(3/2)) and (sqrt(3/2), ∞) and concave downward on the interval (−sqrt(3/2), sqrt(3/2)).

The inflection point of the function is at x = ±sqrt(3/2).c) To find the intervals on which the function is increasing or decreasing, we need to analyze the sign of the first derivative:

f(x) = x⁴ − 2x² + 3f'(x) = 4x³ − 4xThe function is decreasing on the interval (−∞, 0) and increasing on the intervals (0, 1) and (−1, ∞).

Thus, the function is increasing on (0, ∞) and decreasing on (−∞, 0).So, the intervals of increase are (0, ∞) and intervals of decrease are (−∞, 0).

Therefore, the simple answer is:

a) The function has a local maximum at x = ±1 and a local minimum at x = 0.

b) The function is concave upward on the intervals (−∞, −sqrt(3/2)) and (sqrt(3/2), ∞) and concave downward on the interval (−sqrt(3/2), sqrt(3/2)).

The inflection point of the function is at x = ±sqrt(3/2).c) The function is increasing on (0, ∞) and decreasing on (−∞, 0).

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To determine the number of items sold that produces a monthly revenue of $19,200, we need to solve the equation R = 19,200, where R is the monthly revenue given by R = xp and p is the price of each item.

The demand equation p = 20 - 0.01x can be used to find the price p in terms of the number of items sold x. By substituting the expression for p into the equation for R, we can solve for x.

The monthly revenue R is given by R = xp, where x is the number of items sold per month and p is the price per item. We are given that R = $19,200.

Using the demand equation p = 20 - 0.01x, we can express p in terms of x. Substituting this expression into the equation for R, we get R = x(20 - 0.01x).

Setting R equal to 19,200, we have 19,200 = x(20 - 0.01x). Rearranging the equation, we obtain 0.01x² - 20x + 19,200 = 0.

This is a quadratic equation, and we can solve it by factoring, completing the square, or using the quadratic formula. Once we find the values of x that satisfy the equation, we can determine the number of items sold that produces a monthly revenue of $19,200.

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Answer:

-5

Step-by-step explanation:

Answer:

Step-by-step explanation:

No

In summary, the typical period of time used in a short-interval schedule is one week.

A short-interval schedule is a type of work schedule used by employers to plan and assign work hours to their employees in a more frequent and flexible manner. The typical period of time used in a short-interval schedule is one week.

This means that instead of planning out work schedules for longer periods such as a month or a quarter, employers using short-interval schedules plan work schedules for shorter periods of time, typically one week. This allows employers to adjust the work schedules based on changes in demand, production, or employee availability.

Short-interval schedules are often used in industries that have fluctuating demands or that require a high level of flexibility. Examples of such industries include retail, hospitality, and healthcare. With short-interval schedules, employees can work different shifts and hours each week, which can help them to balance their work and personal lives.

In summary, the typical period of time used in a short-interval schedule is one week.

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Answer:

d

Step-by-step explanation:

Answer:

uno de los 5 mejores deseos para el colegio y para la comunidad educativa en la definición 3 x 6=√57

Answer: 4

Step-by-step explanation:

-4 - (-2) = -2

7--1 = 8

8 over 2

4 over 1

To map ΔABC to ΔQRS by two rigid transformations where the first was to translate vertex B to vertex R, the next transformation should be a reflection across the line containing AB.

A rigid transformation in mathematics is a geometric transformation of a Euclidean space that maintains the Euclidean distance between each pair of points. It is also known as a Euclidean transformation or Euclidean isometry.

Here when vertex B is translated to vertex R, we will obtain the two triangles attached like the shape of a dart with AB or QR as their common side. Reflecting ΔABC along line AB thus map ΔABC with ΔQRS.

-- The question is incomplete without diagram, answering to the diagram attached --

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Answer:

A 5c+ 275 > 500

Step-by-step explanation:

Allie will have 2 oranges left over after dividing them evenly among the 11 baskets.

If Allie has 123 oranges and she wants to evenly divide them among 11 baskets, we can find the number of oranges left over by dividing the total number of oranges by the number of baskets and calculating the remainder.

To evenly distribute the oranges among the 11 baskets, we perform the division:

123 ÷ 11 = 11 with a remainder of 2

The quotient 11 represents the number of oranges that can be evenly distributed among the 11 baskets. The remainder 2 represents the number of oranges left over after the even distribution.

Therefore, Allie will have 2 oranges left over after dividing them evenly among the 11 baskets.

It's important to note that when dividing a certain number of objects among a specific number of groups, remainders may occur if the division is not exact. In this case, with 123 oranges and 11 baskets, 11 oranges can be evenly distributed, leaving 2 oranges as leftovers.

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The ∆ABC is an isosceles triangle and have the base angles m∠A and m∠C equal to 51° and the angle m∠B is equal to 78°.

An isosceles triangle have the measure of its base angles to be equal, and the sum of the interior angles sum up to 180°.

Given that sides AB ≅ BC, then the triangle ∆ABC has two sides with similar length and base angles so;

angles m∠A and m∠C are the base angles are both equal to 51°

m∠B = 180° - (51 + 51)° {sum of interior angles of a triangle}

m∠B = 180° - 102°

m∠B = 78°

Therefore, the isosceles triangle ∆ABC have the base angles m∠A and m∠C equal to 51° and the angle m∠B is equal to 78°.

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Answer:

The loan will be paid after 39 monthly installments.

Step-by-step explanation:

Since I am paying off a student loan in monthly installments, and after the 4th payment the remaining balance is $ 13,900, while after the 5th payment my remaining balance is $ 13,500, to determine the amount of payments in which the loan was agreed I must perform the following calculation:

13900 - 13500 = 400

400 x 5 = 2000

2000 + 13500 = 15500

15500/400 = 38.75

Thus, the loan will be paid after 39 monthly installments.

Answer:

x>22

Step-by-step explanation:

Solve the inequality:

-3x<-14-52

-3x<-66

x>22

( You have to switch the sign because you are dividing by a minus)

The mean of the machine output is μ = 2.0 litres.The standard deviation of the machine output is σ = 0.01 litres. The size of the sample is n = 5.

Let's find the control limits for the sampling distribution of sample means. Since the size of the sample is 5, the standard deviation of the sampling distribution of the sample mean is given by σₘ = σ/√nσₘ = 0.01/√5σₘ ≈ 0.00447For the sampling distribution of the sample mean, the margin of error is calculated using the formula below.

Z-score is used here instead of the t-score since the sample size is greater than 30.z = 1.96 margin of

margin of error = 1.96(0.00447)

margin of error ≈ 0.00876

The control limits for the sample mean are given by: Lower control limit (LCL) = μ - margin of error

LCL = 2 - 0.00876LC

L ≈ 1.99124

Upper control limit (UCL) = μ + margin of error Therefore, the lower control limit and the upper control limit are roughly 1.99124 and 2.00876, respectively, which include roughly 95.5% of the sample means.

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Answer:

your answer will be 30 and 28

Step-by-step explanation:

example: rewrite the equation and solve 2 x ? = 6

1) 2x2 = 4

2) 4 x 2 = 8

3) 8- 2 = 6

so meaning to say that 2x2 = 4 x 2 = 8 - 2 equals 6

hint: ( every number is 3 times before the next number)

so all you do is 2 x 3 = 6, 4 x 3 = 12, 3 x 4 = 12, 5 x 2 = 10, 6 x 5 = 30, 7 x 4 = 28. so your next numbers will be 28 and 30.

(hope this helped)

If the company's annual profit (in millions of dollars) as a function of the price of a pair of socks (in dollars) is modeled by P(x)=−3(x−5) ^2+12, the maximum profit is $87 million.

The given profit function is in the form of a quadratic equation with a negative coefficient of the squared term. This means that the graph of the function is a downward-facing parabola, and the vertex of this parabola represents the maximum value of the function.

To find the vertex, we need to convert the given function into vertex form:

P(x) = -3(x - 5)^2 + 12

= -3(x^2 - 10x + 25) + 12

= -3x^2 + 30x - 63

Completing the square, we get:

P(x) = -3(x - 5)^2 + 12 + 75

= -3(x - 5)^2 + 87

The vertex of this parabola is at the point (5, 87), which represents the maximum profit the company can earn.

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64*256*1,024=16,777,216

#\(#RosalindIsHereToHelp\)

Step-by-step explanation:

Well they made 19 clay, where 12 were vases. That means 7 were not vases. She randomly chooses 16 clay objects, which then also means 3 were left behind. so if the vases are  12/19, which is approximately 63%, then 63% of the objects are vases. Makes sense, right? Well now we need to multiply that by the initial 11 in the question. After all of this work..

Answer: 6.9474 or 6.94736.

Please mark as Brainliest.

These forecasts illustrate bias.

Therefore, these forecasts illustrate bias.

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The Food and Drug Administration should put a stronger warning label on packages of ibuprofen.

To determine whether this proportion of 23 out of 440 users suffered from side effects, it is significant that a hypothesis test can be conducted.

The null hypothesis would be that the proportion of arthritis patients who suffer side effects when using ibuprofen is less than or equal to 3%, while the alternative hypothesis would be that the proportion is greater than 3%.

Using a one-tailed z-test with a significance level of 1%, the calculated z-score is 2.32. This falls in the rejection region, meaning that the null hypothesis can be rejected in favor of the alternative hypothesis.

Therefore, it can be concluded that more than 3% of arthritis patients suffer side effects when using ibuprofen to relieve the pain. As a result, the Food and Drug Administration should put a stronger warning label on packages of ibuprofen.

It is important for patients to be aware of the potential side effects and risks associated with this medication.

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The ratio of dividends to the average number of common shares outstanding is known as the dividend yield. It is a measure of the return on an investment in the form of dividends received relative to the number of shares held.

To calculate the dividend yield, you need to divide the annual dividends per share by the average number of common shares outstanding during a specific period. The annual dividends per share can be obtained by dividing the total dividends paid by the number of outstanding shares. The average number of common shares outstanding can be calculated by adding the beginning and ending shares outstanding and dividing by 2.

For example, let's say a company paid total dividends of $10,000 and had 1,000 common shares outstanding at the beginning of the year and 1,500 shares at the end. The average number of common shares outstanding would be (1,000 + 1,500) / 2 = 1,250. If the annual dividends per share is $2, the dividend yield would be $2 / 1,250 = 0.0016 or 0.16%.

In summary, the ratio of dividends to the average number of common shares outstanding is the dividend yield, which measures the return on an investment in terms of dividends received per share held.

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Hey there! :)

Answer:

C. BC = 39 units.

Step-by-step explanation:

Use the Pythagorean theorem to solve for BC. Let BC = c, AB = a, and AC = b.

c² = a² + b²

c² = 15² + 36²

Square and simplify:

c² = 225 + 1296

c² = 1521

c = √1521

c = 39 units.

Therefore:

BC = 39 units.

Answer:

C. 39

Step-by-step explanation:

Use Pythagorean Theorem to find the missing length

15² + 36² = C²      Simplify

225 + 1296 = C²   Add

1521 = C²              Take the square root of both sides

39 = C

The diameters of a mechanical component produced on a certain production line are known from experience to have a normal distribution with a mean of 97.5 mm and standard deviation 4.4mm.

We have to determine the proportion of components with diameter between 95mm and 105mm..

Here, mean = μ = 97.5 mm

Standard deviation = σ = 4.4 mm

So, we have to find the probability that X lies between 95mm and 105mm.

P(95 < X < 105) = P(X < 105) - P(X < 95)From the standard normal table, we have Z95 = (95 - 97.5) / 4.4 = -0.56818and Z105 = (105 - 97.5) / 4.4 = 1.70455

Now, we can find P(95 < X < 105) using Z-scores as shown:

P(95 < X < 105) = P(-0.56818 < Z < 1.70455) = P(Z < 1.70455) - P(Z < -0.56818)

By using the standard normal table, we can find these probabilities as:

P(95 < X < 105) = 0.9569 - 0.2839 = 0.673

Therefore, the proportion of components with diameter between 95mm and 105mm is approximately equal to 0.673, or 67.3% when rounded off to one decimal place.

So, the required answer is 0.6730 (4 decimal places).

So, the proportion of components with diameter between 95mm and 105mm is approximately equal to 0.6730.

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Answer:

Step-by-step explanation:

First find the hyp..

6^2 + 20^2 = x^2

x = 20.88

Using x, we now know the extra height missing from the original tree height, so we add 6 to find the original.

20.88 + 6 = 26.88ft

The tree was 26.88 feet tall before the storm.

The relationship between the three sides of a right-angled triangle is explained by the Pythagoras theorem, commonly known as the Pythagorean theorem. The Pythagorean theorem states that the square of a triangle's hypotenuse is equal to the sum of its other two sides' squares.

We have Perpendicular = 6 feet

and, base = 20 feet

Using Pythagoras theorem we get

H² = P² + B²

H² = 6²+ 20²

H²= 36+400

H² = 436

H = 20.88 feet

thus, the height of the tree = 20.88 + 6 = 26.88 feet

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