Solve the problem.The voltage E in an electrical circuit is given by E = 2.6 cos 160?t, where t is time measured in seconds. Find the period.
A. 
B. 80
C. 80?
D. 
Answer: D
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Solve the problem.Bob, the incredible shrinking man, loses half of his height each day after he was exposed to a mysterious form of cosmic radiation. How many days before he is literally "knee-high to a grasshopper"? Assume that a grasshopper's knee is 4 millimeters high and that Bob is 2 meters tall. Round your answer to the nearest whole day. (1000 millimeters = 1 meter)
Fill in the blank(s) with the appropriate word(s).
Use the Venn diagram below to determine the probability.
P(A ? C)
A. 
B. 
C. 
D. 
Use the graph to determine the domain and range of the function. 
A. domain: {x|x ? 3} range: {y|y ? -2} B. domain: {x|x ? 3} range: {y|y ? 2} C. domain: {x|x ? -2} range: {y|y ? 3} D. domain: {x|x ? 2} range: {y|y ? 3}
Rationalize the denominator. Write the quotient in lowest terms.
A. 
B. 
C. 
D. 