Solve the exponential equation. Use a calculator to obtain a decimal approximation, correct to two decimal places, for the solution.7x = 15
A. 1.39
B. 0.99
C. 0.72
D. 5.27
Answer: A
Mathematics
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Find the formula for df-1/dx.f(x) = x3/5
A. 
x2/3
B. x-2/3
C. 
x-2/5
D. x5/3
Mathematics
The following table shows the stopping distance D, in feet, for a car that is traveling at a speed of S miles per hour. Use power regression to model the stopping distance as a function of the speed. Use two digits of accuracy for the coefficient and for the power. S 25 35 40 60 75 D 86 131 164 301 439?
A. ?
B. 
C. ?
D. ?
Mathematics
Find the area.
A. 578 in.2 B. 646 in.2 C. 739.5 in.2 D. 1479 in.2
Mathematics
Find the second derivative.y = 5x2 + 6x - 8
A. 5 B. 10 C. 10x + 6 D. 0
Mathematics