Solve the problem.A flare fired from the bottom of a gorge is visible only when the flare is above the rim. If it is fired with an initial velocity of 
and the gorge is 320 ft deep, during what interval can the flare be seen?(h = -16t2 + vot + ho.)
A. 12 < t < 13
B. 0 < t < 4
C. 4 < t < 5
D. 8 < t < 9
Answer: C
Mathematics
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What will be an ideal response?
Mathematics
Perform the indicated operation or operations. Write the answer in simplest form. If the problem contains mixednumbers and the answer is an improper fraction, express the answer as a mixed number.- 
+ 
A. 
B. - 
C. - 
D. 
Mathematics
Write the fraction in simplest form.
A. 
B. 
C. 
D. 
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Find the magnitude of the vector and the angle 
, 
, that the vector makes with the positive x-axis.
?
?
?
?
What will be an ideal response?
Mathematics