The area of a circle is 36cm^2 (2 is the exponent) (a) find the radius of the circle

(b) find the circumference of a circle

a) 3.39 cm b) 21.29 cm

Step-by-step explanation:

ok so the area of a circle is r^2.

if the area is 36 cm^2 we can divide it by 3.14, which is pi (). that gives us 11.46. now we find the approximate square root of this.

this is approximately equal to 3.39. the radius is about 3.39cm.

now that we know the radius, we can easily find the circumference. the formula for this is d. the diameter is just the radius times 2. (3.39)(2)

we plug the numbers into the formula: 3.14(6.78)=21.29 cm =d

step-by-step explanation:

correct choice is b

step-by-step explanation:

when you calculate the average rate of change of a function, you are finding the slope of the secant line between the two points. for the function the average rate of change from point to point can be calculated as

to find the average rate of change from day 2 to day 10, note that at day 2, 8 houses were sold, so a(2,8) and at day 10, 2 houses were sold, so b(10,2). thus,