Use a product-to-sum identity to rewrite the expression.sin 38° sin 50°
A. 0.5(cos(-12°) - cos(88°) )
B. 0.5(cos(88°) + cos(-12°) )
C. 0.5(sin(88°) + sin(-12°) )
D. 0.5(sin(-12°) - sin(88°) )
Answer: A
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There were many names mentioned in this section. Give a brief description for the person named in problem, telling how they were related to the development of computers.Paul Baran
A. 1st to use term 'personal computer' B. helped build first computer C. 1st computer in the 1800s D. 1st to envision Internet E. 1st supercomputer
Write the expression for the general (or nth) term, an, of the arithmetic sequence. Then, find the indicated term of the arithmetic sequence.a = 5, d = 6; find an and a13
A. an = -1 - 6n, a13 = 77 B. an = -1 + 6n, a13= 77 C. an = 5 + 6n, a13 = 77 D. an = -1 + 6n, a13 = 53
Integrate.
dxEnter your answer without parentheses.
Fill in the blank(s) with the appropriate word(s).
Solve the problem.The time of a telephone call (in minutes) to a certain town is a continuous random variable with a probability density function defined by 
for 
Find the probability: 
A. 0.7830 B. 0.3170 C. 0.999999 D. 0.2170