Answer:
38°
Step-by-step explanation:
Using the Cosine rule in Δ ABC
cos A = 
where a, b and c are the sides of the triangle.
Here a = 5, b = 3 and c = 7 , thus
cos A =
=
=
, thus
∠ A =
(
) ≈ 38°
Answer is -8
(photo shows step by step)
The answer for the question is C
There is a 47% decrease in Jane's closet space.
Step-by-step explanation:
Old measurement of closet = 66 square feet
New measurement of closet = 34.98 square feet
Change = New value - Old value
Change = 34.98 - 66 = -31.02 square feet
The negative sign indicates the decrease.
Decrease percent = 

There is a 47% decrease in Jane's closet space.
Keywords: decrease, percentage
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