Answer:
The answer should be D. 120 degrees
For these problems you have to use PEMDAS so for problem 15 you would do the parentheses first, (21-3) you get 18 and then exponents, 3^2, you get 9, no multiplication but there is division so take your answers, 18 and 9 and divide them, you get 2, so the answer to 15 is 2.
0.368 in expanded form would be...
0.000 + 0.300 + 0.060 + 0.008
or simply
.3 + .06 + .008