Find the area of the circle given the diameter is 8. Use 3.14 for pi

Answers

Answer 1

Answer:

Answer:

A = 50.265482457437 or A = 50.27 or A = 50.265

Step-by-step explanation:

Related Questions

Is 5 a solution for 3x + 4 = 19
How do you find the derivative of h(t)=sqrt(t)(1-t^2)
A penny is thrown straight down froma height of 200 feet. At the same time, a paintbrush is dropped from a height of 100 feet. The polynomials represent the heights (in feet) of the objects after t seconds. -16t²- 40t + 200 -16t² + 100 a. Write a polynomial that represents the distance between the penny and the paintbrush after 7 seconds. b. Interpret the coefficients of the polynomial in part (a).
Which is equivalent to 7-29i / 8-13i
I need help!! I need to pass math!! Please help I know it's a lot but I need help I don't get any of this!

It takes a motorboat 6 hours to travel 96 miles down a river, and 2 hours longer to make the return trip. Find the speed of the current.

Answers

Speed = distance / time
Down river------> 96/6 = 16 mph
up river<------ 96/(6+2) = 12 mph
difference of 4 mph or +- 2 mph
14 + 2 for down river or with the flow
14 - 2 for up river, against the flow
so the speed of the river is 2 mph
((16+12)/2)-12 = 2 or ((16+12)/2)-16 = -2 depending on which way you define to be positive -- Speed is scaler anyway so can only be positive
the speed of the boat in still water is 14 mph

Maria is comparing the prices of two window cleaning companies. Company A charges $6 per window and an additional $12 as service charges. Company B charges $5 per window and an additional $15 as service charges.Part A: Write equations to represent Company A's and Company B's total charges for cleaning a certain number of windows. Define the variable used in the equations. (4 points)

Part B: Which company would charge less for cleaning 8 windows? Justify your answer. (3 points)

Part C: How much money is saved by using the services of Company B instead of Company A to clean 6 windows? (3 points)

Answers

Part A
y=6x+12
y=5x+15
x is the amount of windows, y is the total amount of money
Part B
y=6(8)+12 =60
y=5(8)+15 =52
Company B
Part C
y=6(6)+12 =48
y=5(6)+12 =42
$6 is saved

Marina saved $80 from her babysitting job. She wants to buy some shirts and pants that are on sale at her favourite store for $17 each. How many items of clothing can she buy?

Answers

Answer:

Step-by-step explanation:

Total amount of money that Marina saved from her babysitting job is $80.

She wants to buy some shirts and pants that are on sale at her favourite store for $17 each. To determine how many items of clothing that she can buy, we would divide the total amount that she saved by the cost of each clothing. It becomes

80/17 = 4.7.

Since the number of clothing must be whole number, the number of clothing that she can buy would be 4

Help quick!If X= -3
What is:

2
X + X =

( what is X cubed add X)

Answers

i thought that was all one equation lol this is very simple just plug in -3 for x
which is -3^2-3 which is -12

Answer:

-12

Step-by-step explanation:

Find dy/dx
2x+3y=sinx

Answers

$2x+3y=sinx\n\n3y=sinx-2x\ \ \ \ /:3\n\ny=(1)/(3)(sinx-2x)\n\n(\delta y)/(\delta x)=\left[(1)/(3)(sinx-2x)\right]'=(1)/(3)\left[(sinx)'-(2x)'\right]=(1)/(3)(cosx-2)$

Use substitution to solve this system of equations:
5x+y=10,
y=x+4.

Answers

Answer:

Step-by-step explanation:

5x + x + 4 = 10

6x + 4 = 10

6x = 6

x = 1

y = 1 + 4

y = 5

(1, 5)

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