$990
550 x .80 = 440
$550 + $440 = $990
Answer:
<em></em>
<em></em>
<em></em>
Step-by-step explanation:
Given

--- distance from building
--- height of the building
Let the height of the building be H. So:


Make H the subject


The required height s:



<em></em>
<em> --- approximately</em>
Answer:
Integers are the set of whole numbers and their opposites. Whole numbers greater than zero are called positive integers. Whole numbers less than zero are called negative integers.