Solve the problem.A foul tip of a baseball is hit straight upward from a height of 4 feet with an initial velocity of 
per second. The function 
+ 4 describes the ball's height above the ground, s(t), in feet, t seconds after it was hit. What is the instantaneous speed of the ball 0.4 seconds after it was hit?
A. 35.2
B. -12.8
C. 12.8
D. -35.2
Answer: A
Mathematics
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Decide whether or not the given equation is an identity.2 sin4 x - 3 sin2 x + 1 = cos2 x(1 - 2 sin2 x)
A. Yes B. No
Mathematics
Provide an appropriate response.Write the quotient, using positive exponents: 
A. x10 B. x-6 C. x6 D. x4
Mathematics
Find the sum.-17 + 17
A. -17 B. 34 C. -34 D. 0
Mathematics
Solve the system by graphing on a calculator. Round to the nearest hundredth if necessary.y = ln(3x - 2)x2 + 3y2 = 7
A. {(0.74, -1.47), (1.73, 1.16)} B. {(0.77, 1.46), (-0.59, -1.49)} C. {(5.25, 2.62)} D. {(1.73, -1.16), (0.74, 1.47)}
Mathematics