Find the least common multiple.16, 20
A. 80
B. 320
C. 36
D. 20
Answer: A
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Without graphing the function, determine its amplitude or period as requested.y = sin 5xFind the period.
A. 5
B. 
C. 1
D. 2?
Solve the problem.Ariel, a marine biologist, models a population P of crabs, t days after being left to reproduce, with the function 
. Assuming that this model continues to be accurate, when will this population become extinct? (Round to the nearest day.)
A. 911 days B. 547 days C. 707 days D. 1512 days
Find the unknown number in the proportion. Write your answer as a whole number or a mixed number if possible.
= 
A. x = 
B. x = 4
C. x = 
D. x = 14
Write a formula for the general term (the nth term) of the arithmetic sequence. Then use the formula for an to find a20, the 20th term of the sequence.4, 12, 20, 28, 36, . . .
A. an = 4n - 1; a20 = 79 B. an = 4n - 8; a20 = 72 C. an = 8n - 1; a20 = 159 D. an = 8n - 4; a20 = 156