Solve the problem.If an object is thrown upward with an initial velocity of 80 ft/sec, its height after t sec is given by 
Find the number of seconds before the object hits the ground.
A. 2.5 sec
B. 64 sec
C. 5 sec
D. 40 sec
Answer: C
Mathematics
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Find an equation in the form y = Acos x or y = Asin x that represents the given graph.
A. y = -3.5cos x B. y = -3.5sin x C. y = 3.5sin x D. y = 3.5cos x
Mathematics
Solve the system of equations. If the system has no solution, say that it is inconsistent.
A. x = 
, y = - 
; (
, - 
)
B. x = 4, y = 8; (4, 8)
C. x = 2, y = 3; (2, 3)
D. inconsistent
Mathematics
Find the sum.
A. 
+ 
B. 
+ 
C. 
+ 
D. 
+ 
Mathematics
Given a = 4.6, b = 6.1, and c = 9.1, use Heron's Area Formula to find the area of ?ABC. Round your answer to two decimal places. ?
A. 10.79 B. 9.89 C. 12.60 D. 8.58 E. 12.09
Mathematics