Solve the problem.An object is thrown upward from the top of a 
building with an initial velocity of 48 feet per second. The height h of the object after t seconds is given by the quadratic equation 
When will the object reach the ground?
A. -2 sec
B. 160 sec
C. 2 sec
D. 5 sec
Answer: D
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
Write the number as a product of primes.77
A. 7 ? 7? 11 B. 7 ? 13 C. 7 ? 11 D. 2 ? 7 ? 13
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Find area of figure. Round to the nearest hundredth if necessary.Find the area of a rectangle measuring 5.8 yd by 21.41 yd.
A. 33.64 yd2 B. 248.356 yd2 C. 124.178 yd2 D. 27.21 yd2
Mathematics
Factor.45x2y2 - 5a2b2
A. 5(3xy + ab)2 B. 5(3xy - ab)2 C. 5(3xy + 5ab)(3xy - 5ab) D. 5(3xy + ab)(3xy - ab)
Mathematics