Evaluate the expression for the given replacement values.xz for x = 6, z = 6.8
A. 40.8
B. 12.8
C. 408
D. 4.08
Answer: A
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The speed for certain animals is related to the stride length by a power function. The value of the power in this function is 
. If the stride length is doubled, how is the speed affected? Round your answer to two decimal places if necessary.
?
A. Speed is multiplied by 1.12. B. Speed is multiplied by 2.08. C. Speed is multiplied by 2.18. D. Speed is multiplied by 1.3.
Find the intervals on which the function is increasing and the intervals on which the function is decreasing.f(x) = - 
x2 + 3x - 7
A. Increasing on 
; decreasing on 
B. Increasing on 
; decreasing on 
C. Increasing on 
; decreasing on 
D. Increasing on 
; decreasing on 
Solve the problem.Find y when x = 3.
A. y = 8 B. y = 15 C. y = 5 D. y = 3
Plot the complex number.z = 6
A. 
B. 
C. 
D. 