Factor.25x2 - 36
A. (5x - 6)2
B. (5x + 6)2
C. 25x2 - 36
D. (5x + 6)(5x - 6)
Answer: D
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Use implicit differentiation to find dy/dx and d2y/dx2.2y - x + xy = 2
A. 
= 
; 
= 
B. 
= - 
; 
= 
C. 
= 
; 
= 
D. 
= - 
; 
= 
Find the center and the radius of the circle.x2 + y2 - 10x + 8y = -25
A. (5, -3); r = 4 B. (5, -4); r = 4 C. (5, -4); r = 6 D. (8, -4); r = 4
Find the unit tangent vector T and the principal unit normal vector N. r(t) = 
i + 
j + 4tk
A. T = 
(cos 0.375t)i - 
(sin 0.375t)j + 
k ; N = (-sin 0.375t)i - (cos 0.375t)j
B. T = 
(cos 0.375t)i - 
(sin 0.375t)j + 
k ; N = (-sin 0.375t)i - (cos 0.375t)j
C. T = 
(sin 0.375t)i - 
(cos 0.375t)j ; N = (-sin 0.375t)i - (cos 0.375t)j
D. T = 
(cos 0.375t)i - 
(sin 0.375t)j ; N = (-sin 0.375t)i - (cos 0.375t)j
Solve the problem.This bar graph shows the stopping distance (in feet) for a car traveling at different speeds. Answer the question.
Approximately how many feet would it take a car traveling at 90 ft/sec to stop?
A. 438 feet B. 615 feet C. 561 feet D. 687 feet