Solve the problem.The variable z varies jointly as the 2.4 power of x and the 1.7 power of y. When 
and 
Approximate the constant of variation to three significant digits.
A. 4.70
B. 8.10
C. 6.20
D. 7.60
Answer: C
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Solve the problem.On the January 25 billing date, Vivian had a balance due of $375.46 on her credit card. The transactions during the following month were: 
The interest rate on the card is 1.2% per month. Using the average daily balance method, find the finance charge on February 25 (January has 31 days).
A. $8.32 B. $2.08 C. $8.38 D. $8.42
Find the mean for the list of numbers.Scores on a math test: 75%, 60%, 75%, 94%, 60%Round answer to the nearest whole number if necessary.
A. 72% B. 94% C. 73% D. 60%
Solve the following system by any appropriate method. If there is no real number solution, so state.x2 + y2 = 121y = x - 11
A. (11, 0), (0, -11) B. (-11, 0), (11, 0), (0, -11), (0, 11) C. (-11, 0), (0, 11) D. no real solution
Write the function in the form 
or 
. Find the period and phase shift.y = 
sin
A. y = 
sin
period = 
; phase shift = 
B. y = 
sin
period = 
; phase shift = - 
C. y = 
sin
period = 3; phase shift = 
D. y = 
sin
period = 
; phase shift = 