Verify the identity.sin 
= -cos ?
What will be an ideal response?
sin 
= sin 
cos ? - cos 
sin ? = (-1) ? cos ? - 0 ? sin ? = - cos ?
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Identify the distribution as symmetric, left-skewed, or right-skewed.Number of siblings of adults in the U.S.
A. Right-skewed B. Symmetric C. Left-skewed
Find the interval of convergence of the series.
A. 2 < x < 4 B. 2 ? x < 4 C. x < 4 D. -4 < x < 4
Multiply.a6(2a - 7)2
A. 4a2 + 49a6 B. 2a2 + 49a6 C. 2a2 - 28a + 49a6 D. 4a8 - 28a7 + 49a6
Solve the problem.When a dead body is discovered, one of the first steps in the ensuing investigation is for a medical examiner to determine the time of death as closely as possible. If the temperature of the medium has been fairly constant and less than 48 hours have passed since death, Newton's law of cooling can be used. Newton's law of cooling states, 
, where k is a constant, T is the temperature of the object after t hours, and TM is the (constant) temperature of the surrounding medium. Assuming the temperature of a body at death is 98.6°F, the temperature of the surrounding air is 69°F, and at the end of one hour the body temperature is 90°F, when will the
temperature of the body be 76°F? Round to the nearest tenth of an hour. A. 2 hr B. 0.7 hr C. 4.2 hr D. 0.3 hr