Simplify the expression. Assume that all variables are positive when they appear.
A. 25x
B. 
C. 
D. x 
Answer: C
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Evaluate.The volume of a cylinder with height h and radius r is given by V = ?r2h. Find the volume of the cylinder. Use 3.14 for ?.
A. 175.8 ft3 B. 2461.8 ft3 C. 351.7 ft3 D. 615.4 ft3
Solve the problem.If v = -2i - 4j + k and u = 2i - 5j + 5k, find a vector perpendicular to both v and u.
A. 20i + 27j + 19k B. 7i + 3j + 26k C. -15i + 12j + 18k D. -7i - 3j + 3k
Find the vertex of the quadratic equation's graph and determine whether the graph opens up or down.y = -2x2 + 3x - 12
A. 
, down
B. 
, up
C. 
, up
D. 
, down
Solve the problem.Find the value of a retirement savings account paying an APR of 5.8% after 45 years (contributions made at the end of each year, including the last year) when the annual contribution is $840. Round your answer to the nearest cent.
A. $150,293.50 B. $168,624.83 C. $158,587.63 D. $149,099.04 E. $179,245.06