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2 years ago

Find the area of a circle with a diameter of

Mathematics

2 answers:

Aneli [31]2 years ago

3 0

Answer:

28.27433

Step-by-step explanation:

d= 6

r= d/2=3

area of circle= πr²=28.27433

Irina18 [472]2 years ago

3 0

I don’t know I think

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5. Solve for x using any method you'd like. Round to the hundredth. Show all your work. (2 points each) d. 20x^3 = 7x^5

Sindrei [870]

Solving this equation for x, we have:

$\begin{gathered} 20x^3=7x^5 \\ 7x^5-20x^3=0 \\ x^3(7x^2-20)=0 \\ \begin{cases}x^3=0\to x=0 \\ 7x^2=20\to x=\pm\sqrt[]{\frac{20}{7}}\end{cases} \end{gathered}$

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8 months ago

A car dealership sold 212 cars in 4 months. At what rate did the dealership sell cars in cars per month?

valentinak56 [21]

Answer: 59 cars per month

Step-by-step explanation:

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1 year ago

The vertices of triangle DEF are D(7, 3), E(4, -3), and F(10, -3). Write a paragraph proof to prove that triangle DEF is isoscel

kolbaska11 [484]

Proof method:

1. Calculate the length of each side, DE,DF,EF

2. Compare the length of them, if any pair of them is equal, then it's isosceles.

7 0

2 years ago

Read 2 more answers

The table of values below represents a linear function and shows the amount of money in a tip jar at a dry cleaners since the dr

Hitman42 [59]

A linear equation has a standard form of:

y = mx + b

where in this case,

y = amount of money in tip jar, m = slope, x = number of hours, b = y intercept

We select any two paired data to calculate for the slope:

m = (y2 – y1) / (x2 – x1)

m = (18.25 – 15.50) / (5 – 4)

m = 2.75

y = 2.75x + b

Choosing any one data pair to calculate for b the y-intercept:

15.50 = 2.75 (4) + b

b = 4.5

Therefore there was $4.50 in the tip jar during the opening.

Answer: $4.50

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3 years ago

Read 2 more answers

The marketing research department of a computer company used a large city to test market the firm's new laptop. The department

Anika [276]

Answer:

a. Local maximum = 50 units per week.

b. The graph is never concave upward.

c. (0, 80)

Step-by-step explanation:

a. The revenue function is:

$R(x) = 1275x-0.17x^3$

The derivate of the revenue function for which R'(x) = 0 gives us the local extrema:

$R'(x) =0= 1275-0.51x^2\\x=\sqrt{2,500}\\x=50$

The second derivate of the revenue function determines if x =50 is local maximum or minimum:

$R''(x) = -1.02x\\R''(50) = -1.02*50=-51\\$

Since the second derivate yields a negative value, x = 50 units per week is a local maximum.

b. Since there are no local minimums in the range of 0 < x < 80, the graph is never concave upward.

c. Since there is only one local maximum in the range of 0 < x < 80, the graph is concave downward from x>0 to x<80 or (0, 80)

6 0

3 years ago