Without graphing the function, determine its amplitude or period as requested.y = 
cos (- 
x)Find the period.
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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Solve the given differential equation.y"' - 48y' - 128y = 0
A. y = C1e8x + (C2 + C3x)e-4x B. y = C1e-4x + (C2 cos 8x + C3 sin 8x) C. y = C1e8x + C2e-8x + C3e-4x D. y = C1e-4x + (C2 + C3x)e8x
Mathematics
Solve the problem.Suppose you purchase a 30-year U.S. savings bond with an APR of 4.5%. The face value of the bond is $12,000. Find the purchase price of the bond.
A. $5454.55 B. $5155.75 C. $5106.38 D. $5057.96 E. $4800
Mathematics
Solve.-5x + 40 = 3x - 24
A. -5 B. 5 C. -8 D. 8
Mathematics
List the critical values of the related function. Then solve the inequality.
> 
A. 4, 5; (-?, 4) ? (5, ?)
B. No critical values; (-?, ?)
C. -
, 
; (-?, -
) ? (
, ?)
D. No critical values; ?
Mathematics