Find the length of the unknown side of the right triangle. In each case, a and b represent the lengths of the legs and c represents the length of the hypotenuse.
b = 9, c = 15; find a
A. 14
B. 12
C. 15
D. 11
Answer: B
Mathematics
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Solve the problem.A certain radioactive isotope decays at a rate of 2% per 100 years. If t represents time in years and y represents the amount of the isotope left then the equation for the situation is 
In how many years will there be 94% of the isotope left?
A. 600 years B. 309 years C. 300 years D. 256 years
Mathematics
Perform the indicated operations.
2
A. x2 - 6xy + 9y2 B. x2 - 6xy2 + 9y4 C. x2 + 9y4 D. x2 + 6xy2 + 9y4
Mathematics
Find the inverse of the function.f(x) = 
- 6, x ? 0
A. f-1(x) = (x - 6)2 B. f-1(x) = (x + 6)2, x ? 6 C. f-1(x) = -(x + 6)2, x ? 6 D. f-1(x) = x + 6, x ? 6
Mathematics
Subtract.
A. 6864 B. 6884 C. 8886 D. 6886
Mathematics