Find the AREA of a circle with a diameter of 62 ft. Use 3.14 for the value of pi.

3017.54

Step-by-step explanation:

62/2=31

31 x 31 x 3.14=3017.54

3017.54

Step-by-step explanation:

A = πr²

The radius is half of the diameter so you divide 2 into 62.

62/ 2 = 31

31 x 31 = 961

961 x 3.14 = 3017.54

b

step-by-step explanation:

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional