Answer: We are given:
The height h of a guardrail = 106 centimeters
Absolute deviation = 7 centimeters
The absolute value inequality is 
To find the acceptable heights of a guardrail , we add and subtract absolute deviation(7) from the mean height(106)
The acceptable range of height is:
106 + 7 = 113
106 - 7 = 99
Acceptable heights are defined by

Therefore, the acceptable range of heights of a guardrail are 99 cm to 113 cm.
There are 1000 mm in one meter. So 3.2 meters would equal
3.2 × 1000 = 3,200 mm
320 mm is shorter.
Answer:

Step-by-step explanation:
Because of order of operations, you do exponent first.
. Lastly 8 multiplied by 5 is 40, so the answer is 
these questions don't need steps