Solve the problem.Suppose that a metal block is cooling so that its temperature T(in °C) is given by 
where t is in hours. How long has the cooling been taking place if the block now has a temperature of 700°C?
A. 4 hr
B. 1 hr
C. 0.5 hr
D. 2 hr
Answer: B
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The equation gives the position s = f(t) of a body moving on a coordinate line (s in meters, t in seconds).s = -4 + 11 cos tFind the body's acceleration at time t = ?/3 sec.
A. 
m/sec2
B. - 
m/sec2
C. 
m/sec2
D. - 
m/sec2
Solve the system of equations graphically. If the system does not have a single ordered pair as a solution, state whether the system is inconsistent of dependent.9x - 2y = 305x + 
y = 24
A. (3, 1)
B. (4, 3)
C. (3, 4)
D. (4, -3)
Solve the problem.A BASE jumper's velocity (in meters per second) after t seconds is given by 
where m is the mass of the object in kilograms, g = 9.8 m/s2 is the acceleration due to gravity, and k is a physical constant. How fast is the BASE jumper falling at the end of a 14 second delay? Use 
and 
Round the answer to one decimal place if necessary.
A. 59.3 m/s B. 19.6 m/s C. 830.5 m/s D. 61.9 m/s
Find the exact value of the expression if ? = 30°. Do not use a calculator.g(?) = cos ?Find g(2?).
A. 1
B. 
C. 
D. 