Answer:
0.531 (3 s.f.)
Step-by-step explanation:

Power rule is used for the 3rd step.
Answer:
yes because....
Step-by-step explanation:
6 + 11 > 13

By the fundamental theorem of calculus,

then by standard differentiation,

is concave upward whenever
. The denominator is always positive, so the sign is determined by the numerator alone:

The answer to the question is b