Solve the problem.A weight attached to a spring is pulled down 9 inches below the equilibrium position. Assuming that the period of the system is 
second, determine a trigonometric model that gives the position of the weight at time t seconds.
A. y = 9cos 
t
B. y = 9cos 10?t
C. y = -9cos 10?t
D. y = -9cos 5?t
Answer: C
Mathematics
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Solve the problem.The sales of a mature product (one which has passed its peak) will decline by the function S(t)= Soe-at, where t is time in years. Find the sales after 18 years if 
and 
(Round to the nearest whole number.)
A. 67,355 B. 2,059,009 C. 1822 D. 911
Mathematics
Do the addition. Simplify the result when possible.
?
?
A. 
B. 
C. 
D. 
E. 
Mathematics
Provide an appropriate response.A prime number has exactly 
factor(s).
A. 3 B. 1 C. 0 D. 2
Mathematics
Find zw or 
as specified. Leave your answer in polar form.z = 5(cos 200° + i sin 200°)w = 4(cos 50° + i sin 50°)Find 
.
A. 
(cos 150° + i sin 150°)
B. 
(cos 40° + i sin 40°)
C. 
(cos 150° + i sin 150°)
D. 
(cos 40° + i sin 40°)
Mathematics