If a ball is thrown into the air with a velocity of 58ft/s, its height (in feet) after t seconds is given by 
.
Find the velocity when t=9.
a. -101 ft/s
b. -104 ft/s
c. -106 ft/s
d. -103 ft/s
e. -99 ft/s
b. -104 ft/s
Mathematics
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Write 2.35 × 104 as a decimal number.
A. 235 B. 23,500 C. 2,350,000 D. 0.000235
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Find the direction angle ? for the given vector. Let 0° ? ? < 360° and round ? to the nearest tenth when appropriate.
A. 225° B. 315° C. 270° D. 45°
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Find the indefinite integral.
?
?
A. 
B. 
C. 
D. 
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Solve the inequality, giving its solution set in both interval and graph forms.3 ? 
? 9
A. 
-  |  |
B.
 ? |  |
C.
, 
-  |  |
D.
 ? |  |
Mathematics