Use the fact that the trigonometric functions are periodic to find the exact value of the expression. Do not use a calculator.cos 
A. 
B. 
C. - 
D. - 
Answer: C
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Round the number as indicated.72,328 to the nearest hundred
A. 72,400 B. 72,310 C. 72,300 D. 72,200
Let 
, 
, 
data-wiris-created="true" varid="variable_id_field" variablename="impvar_727a1c5acd514558bf34bd310" />.
?
Perform the operation: 
.
What will be an ideal response?
Solve the problem.A boy is flying a model airplane while standing on a straight line. The plane, at the end of a twenty-five foot wire, flies in circles around the boy. The directed distance of the plane from the straight line is found to be d = 25 cos 
where d is measured in feet and t is the time in seconds. If d > 0, the plane is in front of the boy; if d < 0, the plane is behind him. What is the amplitude? What is the period? Graph d over two periods beginning at t = 0. 
What will be an ideal response?
Find the equation of the least squares line.Managers rate employees according to job performance and attitude. The results for several randomly selected employees are given below. 
A. y = 2.81 + 1.35x B. y = 92.3 - 0.669x C. y = 11.7 + 1.02x D. y = -47.3 + 2.02x