Perform the indicated operation. 
? 2
A. 
B. 
C. 
D. 4
Answer: A
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Identify the equation as either an identity or not.
= cos x + cot x
A. Not an identity B. Identity
Solve the problem.The formula 
can be used to estimate the speed of a car, v, in miles per hour, based on the length, L, in feet, of its skid marks upon sudden braking on a dry asphalt road. If a car is involved in an accident and its skid marks measure 45 feet, at what estimated speed was the car traveling when it applied its brakes just prior to the accident?
A. 25 mph B. 30 mph C. 40 mph D. 35 mph
Solve the problem.An object is thrown upward with an initial velocity of 27 feet per second from the top of a 504-foot building. The height of the object at any time t can be described by the polynomial function 
Find the height of the object at t = 5 seconds.
A. 131 ft B. -265 ft C. 559 ft D. 239 ft
Solve the problem.How many different license plates can be made using 2 letters followed by 4 digits selected from the digits 0 through 9, if letters and digits may be repeated?
A. 260 B. 6,760,000 C. 8 D. 36