Solve the problem.When an object is dropped to the ground from a height of h meters, the time it takes for the object to reach the ground is given by the equation t = 
, where t is measured in seconds. If an object hits the ground after falling for 4 seconds, find the height from which the object was dropped.
A. 196 m
B. 78.4 m
C. 784 m
D. 19.6 m
Answer: B
Mathematics
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19 cm
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A. f(x) = 
B. f(x) = 
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A. 
B. 
C. 
D. 
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Simplify the rational expression. Find all numbers that must be excluded from the domain of the simplified rational expression.
A. 
, x ? - 
B. 
, x ? - 
C. 
, x ? - 
, x ? - 
D. 
, x ? - 
, x ? - 
Mathematics