<span>Absolute value describes the distance of a number on the number line from 0 without considering which direction from zero the number lies. the absolute value of a number is negative.</span>
Answer:

Step-by-step explanation:
Given function:

where:
- h = height (in feet)
- t = times (in seconds)
Rewrite in the form 
The quickest way to do this is to expand
and compare coefficients with the original function.

Comparing coefficients with 



Therefore, substituting the found values into the equation:

Answer: 4
Step-by-step explanation:
u+3=7
u=7-3
u=4