Write the expression with only positive exponents. Assume all variables represent nonzero numbers. Simplify if necessary.7-1 - 3-1
A. - 
B. - 
C. - 
D. 
Answer: B
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Solve the problem.Find symmetric equations for the line through the point P(4, -4, -4) parallel to the vector 
.
A. 
= 
= 
B. 
= 
= 
C. 
= 
= 
D. 
= 
= 
Compute the compound interest.At what interest rate must $4000 be compounded annually to equal $9639.38 after 13 yr? (Round to the nearest percent.)
A. 6% B. 8% C. 7% D. 9%
Find the probability.A family has five children. The probability of having a girl is 1/2. What is the probability of having 2 girls followed by 3 boys? Round to the nearest ten-thousandth.
A. 0.6252 B. 0.3125 C. 0.0313 D. 0.1875
Use Euler circles to check the validity of the argument. ? All candy is fattening. All candy is delicious. Therefore, all fattening food is delicious. ? The argument is __________. ?
A. not valid B. valid