Find the indicated term.a = 3, r = -3 ; 5th term
A. 81
B. 243
C. -729
D. 2187
Answer: B
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Solve the problem.It is necessary to have a 40% antifreeze solution in the radiator of a certain car. The radiator now has 70 liters of 20% solution. How many liters of this should be drained and replaced with 100% antifreeze to get the desired strength?
A. 28 L B. 17.5 L C. 23.3 L D. 35 L
Find all specified roots.Square roots of i
A. -i, i
B. -1, 1
C. 
- 
i, - 
+ 
i
D. 
+ 
i, - 
- 
i
Answer the question or write an explanation.Are the expressions 
and 21 x2 + 1 equal?
What will be an ideal response?
Use a Venn diagram to answer the question.A survey of 134 college students was done to find out what elective courses they were taking. Let A = the set of those taking art; B = the set of those taking basket weaving; and C = the set of those taking canoeing. The study revealed the following information:n(A) = 45; n(B) = 55; n(C) = 40; n(A ? B) = 12; n(A ? C) = 15; n(B ? C) = 23; n(A ? B ? C) = 2.How many students were not taking any of these electives?
A. 44 B. 52 C. 42 D. 10