Rationalize the denominator. Assume that all variables represent positive real numbers. 
A. 
B. 
C. 
D. 
Answer: B
Mathematics
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A ball is tossed upward and then falls to the ground. Its height after t seconds is given by the function 
. At the time the rock reaches its peak, what can be said about 
?
?
A. is positive.
B. is negative.
C. is zero.
D. None of the above
Mathematics
Find the inverse matrix of A.A = 
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.Joe has traveled 
of his total trip. If the trip is a total of 640 miles, how many miles has he gone?
A. 102
miles
B. 128 miles
C. 512 miles
D. 256 miles
Mathematics
Graph the function.y = tan 
A. 
B. 
C. 
D. 
Mathematics