Find the derivative.
A. 
x7 sin (x6)
B. 6x5 sin (x6)
C. -cos (x6) - 1
D. sin (x6)
Answer: B
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Determine the number of spanning trees in the graph.
A. 12 B. 36 C. 35 D. 13
Find parametric equations for the line described below.The line through the point P(-7, 4, 4) and perpendicular to the vectors 
and 
A. x = -59t - 7, y = -47t + 4, z = -84t + 4 B. x = -59t - 7, y = 47t + 4, z = -4t + 4 C. x = -59t - 7, y = 47t + 4, z = -84t + 4 D. x = -59t + 7, y = 47t - 4, z = -4t - 4
Determine whether the proportion is true or false by writing the ratios in lowest terms.
= 
A. True B. False
Solve the problem.A projectile is fired from a cliff 400 feet above the water at an inclination of 45° to the horizontal, with a muzzle velocity of 180 feet per second. The height h of the projectile above the water is given by 
where x is the horizontal distance of the projectile from the base of the cliff. Find the maximum height of the projectile.
A. 1159.38 ft B. 653.13 ft C. 253.13 ft D. 506.25 ft