since the selling price is 89.83 and the cost of is 76, the tax amount is 89.83 - 76 = 13.83.
if we take 76 to be the 100%, what is 13.83 off of it in percentage?
What is m∠D? Enter your answer in the box.
1 answer:
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Answer:
see explanation
Step-by-step explanation:
The sum of the 3 angles in a triangle = 180°
Subtract the sum of the given angles from 180 for B
B = 180° - (90 + 47)° = 180° - 137° = 43°
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tan47° = =
Multiply both sides by 14
14 × tan47° = a, thus
a ≈ 15.0 (to the nearest tenth )
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cos47° = =
Multiply both sides by c
c × cos47° = 14 ( divide both sides by cos47° )
c = ≈ 20.5 ( to the nearest tenth )