Simplify.
+ 
A. 
B. 
C. 
D. 
Answer: B
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Find the length of the section represented by x in the figure. 
a = 1
b = 9
A. 9
B. 14
C. 7
D. 7
If r(t) is the position vector of a particle in the plane at time t, find the indicated vector.Find the velocity vector.r(t) = (cot t)i + (csc t)j
A. v = (sec2 t)i + (tan t sec t)j B. v = (csc2 t)i + (cot t csc t)j C. v = (-sec2 t)i - (tan t sec t)j D. v = (-csc2 t)i - (cot t csc t)j
Find the probability.What is the probability that 18 rolls of a fair die will show 4 fours?
A. 0.0920 B. 0.1839 C. 0.0368 D. 0.3678
Write an algebraic equation and use it to solve the problem.Don James wants to invest $58,000 to earn $6950 per year. He can invest in 
bonds paying 
per year or in a Certificate of Deposit (CD) paying 
per year. How much money should be invested in each to realize exactly $6950 in interest per year?
A. $33,000 in B-rated bonds and $25,000 in a CD B. $24,000 in B-rated bonds and $34,000 in a CD C. $25,000 in B-rated bonds and $33,000 in a CD D. $34,000 in B-rated bonds and $24,000 in a CD