Answer:
2
Step-by-step explanation:
From the graph, we obtain the trigonometric function as:

The corresponding cosine function have equation.

This function is of the form: 
where
is the amplitude.
Therefore the amplitude is |2|=2
The third choice is correct
Answer:The answer is B !
Step-by-step explanation:
2 x 5/ 50 x 18
10 / 900
Divide both by 10
1/90
Answer:
$1.60
Step-by-step explanation:
1 year have 52 weeks.
8.31/52=0.16
0.16*10= 1.60
21.27*40= Annual premium is 850.8 51% of 850.8 is 433.9 ---> semi annual his quarterly is 26% of 850.8 so 221.2 and finally his monthly premium is 9 percent of 850.8 so it's 76.57