Solve the problem.What is the minimum force required to prevent a ball weighing 24.2 lb from rolling down a ramp which is inclined 35.5° with the horizontal?
A. 9.9 lb
B. 7.1 lb
C. 19.7 lb
D. 14.1 lb
Answer: D
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Solve the direct variation.If n varies directly as the square of m and n = 48 when m = 4, what is the value of n when m = -5?
A. -75 B. 60 C. -60 D. 75
Solve the problem.Newton's Law of Cooling states that the temperature of a heated object decreases exponentially over time toward the temperature of the surrounding medium. Suppose that a coffee is served at a temperature of 132°F and placed in a room whose temperature is 70°F. The temperature ? (in °F) of the coffee at time t (in minutes) can be modeled by ?(t) = 70 + 62e-0.08t. What is the temperature of the coffee in 5 minutes?
A. 116.6°F B. 111.6°F C. 115.0°F D. 108.4°F
Use < or > for ? to write a true sentence.
? 
A. < B. >
Simplify.102 + 7 ? 6 - (11 + 5 ? 2)
A. 121 B. 141 C. 621 D. 110