Solve the problem.If it has been determined that the probability of an earthquake occurring on a certain day in a certain area is 
, what are the odds against an earthquake?
A. 19 to 1
B. 18 to 1
C. 20 to 1
D. 1 to 20
Answer: A
Mathematics
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Determine if the given function y = f(x) is a solution of the accompanying differential equation.Differential equation: xy' + y = 
Initial condition: y(9) = 2Solution candidate: y = 
+ 
A. No B. Yes
Mathematics
Use the laws of exponents to simplify. Write the answer with positive exponents.x1/7 ? x6/7
A. x
B. x6/49
C. x6/7
D. 
Mathematics
Perform the indicated operation.
- 
A. 
B. 
C. 
D. 
Mathematics
Multiply.-y(4x3 - 9x2y + 5xy2 - 9y3)
A. -4x3y + 9x2y2 - 5xy3 + 9y4 B. -4x3 + 9xy2 - 5xy3 + 9 C. 4x3y - 9x2y2 + 5xy3 - 9y4 D. -4x3 + 9>x2y - 5xy2 + 9y3
Mathematics