Question

I need help with pre-cal, please!​

Answer 1

b ≈ 4.2

Explanation:

Using the tangent ratio in the right triangle, that is

tan50° =
`(opposite)/(adjacent)` =
`(BC)/(AC)` =
`(5)/(b)` ( multiply both sides by b )

b × tan50° = 5 ( divide both sides by tan50° )

b =
`(5)/(tan50)` ≈ 4.2 ( to the nearest tenth )