Solve the problem.A projectile is thrown upward so that its distance above the ground after t sec is given by 
After how many seconds does it reach its maximum height?
A. 10 sec
B. 30 sec
C. 20 sec
D. 40 sec
Answer: C
Mathematics
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Find the present value. Round to the nearest cent.To get $10,500 after 3 years at 4% compounded annually
A. $9334.46 B. $8889.96 C. $9707.84 D. $1165.54
Mathematics
Multiply mentally.2x2(2x3 + 3x2 - 5x)
A. 4x4 + 6x3 - 10x2 B. 4x5 + 6x4 - 10x2 C. 4x5 + 6x4 + 5x3 D. 4x5 + 6x4 - 10x3
Mathematics
Perform the indicated operations and simplify.Let A = 
, B = 
, and C = 
. Find BC + 2?3.
A. 
B. 
C. 
D. 
Mathematics
Follow the rules for working with measurements.An oil filter for a small car is cylindrical with radius 1.1 in. and height 4.4 in. What is the volume of the oil filter?
A. 33.4 in 3 B. 66.8 in 3 C. 8.35 in 3 D. 83.5 in 3 E. 16.7 in 3
Mathematics