Solve the problem.A projectile is fired with an initial velocity of 400 feet per second at an angle of 45° with the horizontal. In how many seconds will the projectile strike the ground? (Round your answer to the nearest tenth of a second.) The parametric equations for the path of the projectile are x = (400 cos 45°)t, and y = (400 sin 45°)t - 16t2.
A. 25.8 sec
B. 17.7 sec
C. 22.5 sec
D. 14.3 sec
Answer: B
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Describe the curve represented by the equation. Identify the type of curve and its center (or vertex if it is a parabola).(y + 4)2 = 12(x - 5)
A. Hyperbola, (4, -5) B. Parabola, (-5, 4) C. Ellipse, (-4, 5) D. Parabola, (5, -4)
Use colored counters to answer the question. Typically, black counters represent a profit or a positive number, while red counters represent a loss or a negative number. Here, use white in place of red, that is, consider a white counter to mean what a red counter would in the typical case.Draw a colored counter diagram to represent -3.
What will be an ideal response?
Evaluate the exponential expression. Write the answer as an improper fraction where appropriate.
2
A. - 
B. - 
C. 
D. 
Match the equation to the graph.
- 
= 1
A. 
B. 
C. 
D. 