Solve by completing the square.x2 + 14x = -40
A. 4, 10
B. -4, -10
C. ±
D. 50, -10
Answer: B
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For the curve r(t), find an equation for the indicated plane at the given value of t.r(t) = (9 sin 
t + 7)i + (9 cos 13t) - 6)j + 5tk; osculating plane at t = 0.5?.
A. 
(y + 6) + 9
= 0
B. 
(x - 7) + 9
= 0
C. 
(y + 6) + 9
= 0
D. 
(y - 6) + 
= 0
Use the table to find the instantaneous velocity of y at the specified value of x.x = 1. 
A. 0 B. -0.5 C. 1 D. 0.5
Solve.The monthly cost of a certain long distance service is given by the linear function 
where C(t) is in dollars and t is the amount of time in minutes called in a month. Find the cost of calling long distance for 120 minutes in a month.
A. $18.55 B. $20.95 C. $9.60 D. $17.55
Solve the problem.Use the formula P = 2L + 2W to find the perimeter of a rectangle with L = 12 feet and W = 29 feet.
A. 82 B. 24 C. 87 D. 58