Simplify.i40
A. -1
B. -i
C. 1
D. i
Answer: C
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Find the intersection. x = 2 + 4t, y = -6 + 10t, z = 7 + 10t ; -10x + 4y + 10z = 9
A. 
B. (6, 4, 17)
C. 
D. (-2, -16, -3)
Solve the problem.If a group of 284 people is to be split into equal-sized subgroups of at least two people and no more than 30 people, what are the possible group sizes?
A. 2 and 4 B. 2, 3, and 4 C. 2 and 28 D. 3 and 4
Solve the problem. Round your answer to the nearest cent.An investor deposits $42,000 at 6% interest compounded annually. Two years after she makes the first deposit, she deposits another $19,000, also at 6% compounded annually. What total amount will she have four years after her first deposit?
A. $74,372.43 B. $73,164.03 C. $77,011.09 D. $75,653.34
The number of people who donated to a certain organization between 1975 and 1992 can be modeled by the equation 
donors, where t is the number of years after 1975. Find the inflection point(s) from 
through
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?
A. There are no inflection points from 
.
B. There is one inflection point at 
.
C. There are inflection points at 
.
D. There is one inflection point at 
.
E. There are inflection points at 
, 
, 
.