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Answer:

Option b is easier to simplify if used the associative property to change the group.
85(120+80)
Answer:
if t=60, then 6(60)/9-23. (360-198)/9
=18
Let the distance of the engineer from the base of the building be x, then
tan 38 = 300/x
x = 300/tan 38 = 300/0.7813 = 383.98
Therefore, the distance from the engineer to the base of the building to the nearest whole foot is 384 feet.
307,495 rounded to the nearest thousand is 307,000
Hope I helped
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