Solve the equation.
= 
A. ?
B. 
C. {8}
D. {0}
Answer: A
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Solve the problem.The instantaneous growth rate of a population is the rate at which it is growing at every instant in time. The instantaneous growth rate r of a colony of bacteria t hours after the start of an experiment is given by the function 
for 
Find the times for which the instantaneous growth rate is zero.
A. 1 sec, 2 sec, and 4 sec B. 2 sec and 4 sec C. 1 sec and 2 sec D. 1 sec
Provide an appropriate response.The length of time (in minutes) that a person arriving at a train station must wait for a train is uniformly distributed with density function f(x) = 
where 0 ? x ? 20. Find the mean waiting time and the standard deviation.
What will be an ideal response?
Solve the problem.At the first tri-city meeting, there were 8 people from town A, 7 people from town B, and 5 people from town C. If the council consists of 5 people, find the probability of 3 from town A and 2 from town B.
A. 0.072 B. 0.036 C. 0.076 D. 0.023
Find the product or quotient, as indicated. Leave your answer in trigonometric form.Find the product of z1 and z2.z1 = 2[cos (-80°) + i sin (-80°)], z2 = 25(cos 200° + i sin 200°)
A. 50(cos 120° + i sin 120°) B. 50(cos 280° + i sin 280°) C. 27(cos 120° + i sin 120°) D. 50(cos -16,000° + i sin -16,000°)