Is a calculator allowed? 8/13 = 0.61538. Then take arccos of that to get 52 degrees. Arccos on a calculator might be seen as acos or inv-cos.
Answer:

Step-by-step explanation:
Use the method of swapping x and y and isolating y.

Note that domain/range will be swapped as well.
Answer:
V≈340.34
Step-by-step explanation:
V=πr2h
3=π·52·13
3≈340.3392
Answer:
The answer is
<h2>70</h2>
Step-by-step explanation:
3b² - b
when b = 5
Substitute the value of b that's 5 into the expression
That's
3(5)² - 5
= 3(25) - 5
= 75 - 5
We have the final answer as
<h3>70</h3>
Hope this helps you