Simplify the exponential expression. Write the result using only positive exponents.(3x9)(-4x5)
A. -12x45
B. 12x45
C. 12x14
D. -12x14
Answer: D
Mathematics
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Solve for the indicated variable.V = 
Bh for h
A. h = 
B. h = 
C. h = 
D. h = 
Mathematics
Tell whether the expression is a polynomial. If it is, give its degree.9
A. Polynomial, degree 1 B. Polynomial, degree 9 C. Polynomial, degree 0 D. Not a polynomial
Mathematics
Find the exact value of the expression or state that it does not exist.cos
A. 
B. - 
C. 
D. - 
Mathematics
Solve the problem.A barge takes 5 hours to move (at a constant rate) downstream for 45 miles, helped by a current of 2 miles per hour. If the barge's engines are set at the same pace, find the time of its return trip against the current.
A. 9 hr B. 90 hr C. 5 hr D. 7 hr
Mathematics