Solve the problem.A ball dropped from the top of a building has a height of s = 256 - 16t2 meters after t seconds. How long does it take the ball to reach the ground? What is the ball's velocity at the moment of impact?
A. 4 sec, -128 m/sec
B. 16 sec, -512 m/sec
C. 8 sec, -64 m/sec
D. 4 sec, 128 m/sec
Answer: A
Mathematics
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Solve the problem.Given the area A of a circle, the formula r = 
can be used to calculate the radius of the circle. Find the area when the radius is 7.7 cm.
A. A = 59.29 sq cm B. A = 61.15? sq cm C. A = 59.29 ?2 sq cm D. A = 59.29? sq cm
Mathematics
Write a slope-intercept equation for a line with the given characteristics.Passes through (-9, -4.5) and (-7, -0.5)
A. y = -0.5x + 13.5 B. y = 0.5x + 13.5 C. y = -2x + 13.5 D. y = 2x + 13.5
Mathematics
Find the matrix product mentally, without the use of a calculator or pencil-and-paper calculations.
A. 
B. 
C. 
D. 
Mathematics
Determine whether the equation defines y as a function of x. y = 6x2 - 5x + 7
A. function B. not a function
Mathematics