Answer:
BC ≈ 19.4 cm
Step-by-step explanation:
using the cosine ratio in the right triangle
cos71° =
=
=
( multiply both sides by BC )
BC × cos71° = 6.3 ( divide both sides by cos71° )
BC =
≈ 19.4 cm ( to 3 sig. figs )
I’m pretty sure the correct answer is B.
Answer:

Step-by-step explanation:

Or, if you mean (r+3Q)/h=t:

8 hours and 41 mins per day!
(About 9 hours)
Hoped I helped!
Answer:
√2 < 1.8
Step-by-step explanation:
Square of 2 is 1.41421356237309 and that is less than 1.8 continued.