Solve the problem.A sample of 800 grams of radioactive substance decays according to the function 
where t is the time in years. How much of the substance will be left in the sample after 10 years? Round to the nearest whole gram.
A. 1 gram
B. 800 grams
C. 9 grams
D. 605 grams
Answer: D
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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 speed at time t = ?/3 sec.
A. - 
m/sec
B. 
m/sec
C. 
m/sec
D. - 
m/sec
Solve the problem.Let the number of gallons G of water drained from a pool after t hours be given by 
for 
(i) Find G(t + h). (ii) Find the difference quotient. Interpret your result.
A. (i) 3125 - 125t + h (ii) 1; the pool is being emptied at a constant rate of 1 gal/hr. B. (i) 3125 - 125t + 125h (ii) -125; the pool is being emptied at a constant rate of 125 gal/hr. C. (i) 3125 - 125t - 125h (ii) -125; the pool is being emptied at a constant rate of 125 gal/hr. D. (i) 3125 - 125t + 125h (ii) 125; the pool is being emptied at a constant rate of 125 gal/hr.
Multiply. 0.06
A. 0.12 B. 0.0012 C. 1.2 D. 0.012
Solve the problem.In a survey about the number of siblings of college students, the following probability table was constructed: 
What is the probability that a student has less than 2 siblings?
A. 0.56 B. 0.2 C. 0.76 D. 0.24