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Find x. Round to the nearest tenth

A: 5.0
B: 7.8
C: 3.9
D: 4.6

Find x. Round to the nearest tenth A: 5.0 B: 7.8 C: 3.9 D: 4.6-example-1

1 Answer

4 votes

Answer:

D

Explanation:

Using the cosine ratio in the right triangle

cos40° =
(adjacent)/(hypotenuse) =
(x)/(6) ( multiply both sides by 6 )

6 × cos40° = x , then

x ≈ 4.6 ( to 1 dec. place ) → D

User Henrik Gustafsson
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