The Thoroughbred Bus Company finds that its monthly costs for one particular year were given by 
dollars after t months. After t months, the company had 
passengers per month. How
fast was its cost per passenger changing after 6 months?
?
Enter your answer in dollars/month rounded to the nearest cent and without the units.
Fill in the blank(s) with the appropriate word(s).
0.01
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Write a direct variation equation, y = kx, that satisfies the ordered pairs in the table.
A. y = 4x
B. y = 
x
C. y = 
x
D. y = 
x
Multiply mentally.(4x2 + 3)(x - 6)
A. 4x2 - 21x - 18 B. 4x3 - 21x - 18 C. 4x3 - 24x2 + 3x - 18 D. 4x2 - 22x - 18
Solve the problem.While traveling at a constant speed in a car, the centripetal acceleration passengers feel while the car is turning is inversely proportional to the radius of the turn. If the passengers feel an acceleration of 45 feet per second per second when the radius of the turn is 40 feet, find the acceleration the passengers feel when the radius of the turn is 120 feet.
A. 5 ft/sec2 B. 7 ft/sec2 C. 6 ft/sec2 D. 8 ft/sec2
Graph the level curves in the first octant at heights of 
and 
for the given equation.z = 2x - y2
A. 
B. 
C. 
D. 