Find the slope of the line tangent to the curve at the given point.y = 19 cos x; x = 
A. - 
B. 
C. 
D. - 
Answer: D
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Find all the second order partial derivatives of the given function.f(x, y) = ex/y
A. 
= 
; 
= ex/y
; 
= 
= -ex/y
B. 
= 
; 
= 
; 
= 
= 
C. 
= 
; 
= -ex/y
; 
= 
= ex/y
D. 
= 
; 
= ex/y
; 
= 
= -ex/y
Solve the problem.Ms. Smith has 28 32-cent and 20-cent stamps all told. The stamps are worth $7.04. How many of each stamp does she have?
A. 10 32-cent stamps and 18 20-cent stamps B. 11 32-cent stamps and 17 20-cent stamps C. 16 32-cent stamps and 12 20-cent stamps D. 12 32-cent stamps and 16 20-cent stamps
Solve the problem.The velocity of a toy airplane in feet per second after t seconds of flight is V= 360 - 36t, where t ? 0. Find each intercept.
A. (0, 360); (10, 0) B. (0, -10); (-360, 0) C. (0, 10); (360, 0) D. (0, -360); (-10, 0)
Solve and check. Use the square root principle to eliminate the square.(2m - 3)2 = 49
A. 10, -4 B. 2, -5 C. no real solution D. 5, -2