The ph scale measures how acidic or basic a substance is. bleach is said to have a ph of less than 14 and greater than 11. model the normal range of ph values of bleach, using a compound inequality

in simplified version   it would be x ≤-4

step-by-step explanation:

multiply each term in x ≤-4 by -1

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: