Solve. Round your answer to the nearest tenth, if necessary.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 hit the ground?
A. In 5 seconds
B. In 160 seconds
C. In 2 seconds
D. In 7 seconds
Answer: A
Mathematics
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Simplify the expression. Assume that all variables are positive when they appear.
A. 23 B. ±8 C. 64 D. 8
Mathematics
Decide whether the statement is an example of the commutative, associative, identity, inverse, or distributive property.9 + (-9) = 0
A. Associative B. Inverse C. Identity D. Commutative
Mathematics
Find the union.{a, b, c, d, e} ? {f, g, h, i, j}
A. ? B. {a, b, c, d, e} C. {e, f} D. {a, b, c, d, e, f, g, h, i, j}
Mathematics
Solve the equation. Check for extraneous solutions.
A. 
B. 
C. 
D. 
E. no solution
Mathematics