Diameter=50ft
radius=50/2=25
C=2pier
C=2)(3.14)(25)
C=50 (3.14)
C=157ft
this is the area of a circle
Is this correct ?

Circumference = 157 ft

Area = 1962.5 ft^2

Step-by-step explanation:

d = 50

C = pi *d

C = 3.14 * 50

C =157 ft

This is the circumference

The area is found by

A = pi r^2

r  =d/2

r= 50/2 =25

A =pi (25)^2

A = 3.14 *25^2

   =3.14 *625

    =1962.5 ft^2

the revenue of the fitness center, y, is the product of two factors: the number of members and the fee paid by each member. there are 320 members now, but number of members goes down by 10 for each $5 increase in fees, so if x is the number of $5 price increases then members is equal to (320 - 10x). since the fee is currently $45, and the fee increases by $5 for every price bump x, the fee is given by (45 + 5x). so, revenue y is given by y = (320 - 10x)(45 + 5x).

it should be a.

hope it