Determine if the graph of the function is concave up or concave down.y = (x + 2)2
A. Concave down
B. Concave up
Answer: B
Mathematics
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Find 
.y = 
A. 
B. 
C. 
D. 
Mathematics
Solve the right triangle shown in the figure. 
= 3.9 cm, 
= 1.9 cm, ?C = 90°
A. ?A = 64°, ?B = 26°, 
= 4.3 cm
B. ?A = 29°, ?B = 61°, 
= 5.8 cm
C. ?A = 26°, ?B = 64°, 
= 4.3 cm
D. ?A = 60°, ?B = 30°, 
= 4.3 cm
Mathematics
Solve the problem.Let f(x) compute the cost of a rental car after x days of use at $40 per day. What is the interpretation of the solution of 
A. The number of days rented for $40 B. The cost of rental for 40 days C. The number of days rented for $210 D. The cost of rental for 210 days
Mathematics
Use the quotient rule to simplify the expression.
A. 
B. -81
C. 
D. 81
Mathematics