10 ft А - “不 6 ft v 10 ft - 12 ft B C | 12 ft 4 ft 4 ft
1 answer:
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Integrate both sides with respect to <em>t</em> :
∫ d<em>y</em>/d<em>t</em> d<em>t</em> = ∫ -12<em>t</em> ² d<em>t</em>
<em>y(t)</em> = -4<em>t</em> ³ + <em>C</em>
Use the initial condition to solve for <em>C</em> :
5 = -4•0³+ <em>C</em>
<em>C</em> = 5
So
<em>y(t)</em> = -4<em>t</em> ³ + 5
and the answer is D.
Alternatively, you can directly apply the fundamental theorem of calculus:
we know that
In the right triangle ABC
∠∠
------> by complementary angles
so
Step
Find the measure of angle B
we know that
in this problem
so
Step
Find the measure of angle A
therefore
the answer is the option
35.5° and 54.5°