Without graphing the function, determine its amplitude or period as requested.y = -3 cos xFind the period.
A. 2?
B. 
C. 3
D. ?
Answer: A
Mathematics
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Solve: 
y = -28
A. -98
B. -
C. -8
D. -
Mathematics
Solve the problem.Strontium 90 decays at a constant rate of 2.44% per year. Therefore, the equation for the amount P of strontium 90 after t years is P = P0 e-0.0244t. How long will it take for 15 grams of strontium to decay to 5 grams? Round answer to 2 decimal places.
A. 450.25 years B. 40.50 years C. 4.50 years D. 45.03 years.
Mathematics
Solve the following linear programming problem.
?
Minimize 
subject to
?
?
A. ?1,485 B. ?825 C. ?1,890 D. ?1,050 E. ?630
Mathematics
Solve by completing the square.x2 = 7 - 8x
A. -4 ± 
B. -4 ± 2
C. 4 + 
D. -1 ± 
Mathematics