Someone and fast 5 - 7 plz and thx and explain

5.  2 x 3.14 x 4 = 25.12 in.

6. 80 = 3.14 x d

d = 80/3.14  = 25.48 ft

7. 3.14 x 9.6^2 = 289.38m^2

part a

x     y

0     8

1     7.5

2     7

3     6.5

4     6

5     5.5  

for every hour i deducted .5 inches from the length of the candle

part b

it is a function because for every x value there is only one y value

part   c

for every x value there is only one y value

x       y

0       8

1       7.6

2       7.2

3       6.8

step-by-step explanation: