Multiply. Assume all variables represent nonnegative real numbers.6
(
+ 
)
A. 6
+ 5x
B. 30
+ 30x
C. 6
+ 5x
D. 6
+ 30x
Answer: D
Mathematics
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Find the length of the indicated portion of the curve.r(t) = (2cos t)i + (2sin t)j + 3tk, 0 ? t ? ?/2
A. 
?
B. 
?
C. 
?
D. 
?
Mathematics
Solve.The average summer temperature in the Antarctica was -25°F and the average winter temperature was 
How much higher was the summer average temperature?
A. 31°F B. -81°F C. -31°F D. 81°F
Mathematics
Multiply.(-7)(-7)(-7)
A. -343 B. 343 C. -333 D. -353
Mathematics
Solve.A projectile is fired upward from the ground with an initial velocity of 300 feet per second. Neglecting air resistance, the height of the projectile at any time t can be described by the polynomial -16t2 + 300t. Find the height of the projectile at t = 5 seconds.
A. 1420 ft B. 1200 ft C. 1500 ft D. 1100 ft
Mathematics