The equation gives the position s = f(t) of a body moving on a coordinate line (s in meters, t in seconds). s (m)
What is the body's velocity when t = 2.5 sec?
A. 2 m/sec
B. 3 m/sec
C. 1 m/sec
D. -2 m/sec
Answer: D
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Graph the quadratic equation on [-10, 10] by [-10, 10]. Does this window give a complete graph?f(x) = 0.1x2 - 2x - 6
A. 
No
B. 
No
C. 
Yes
D. 
No
Find the determinant of the matrix and determine if the matrix is invertible 
What will be an ideal response?
Tell whether a linear model or a quadratic model is appropriate for the data. If a quadratic model is appropriate, then decide also whether the lead coefficient should be positive or negative.The amount of sales tax paid as a function of the sales price.
A. Quadratic; leading coefficient positive B. Quadratic; leading coefficient negative C. Linear
Answer the question.Consider the linear equation in three variables x - y + z = 9. Find a pair of linear equations that, when considered together with the given equation, will form a system having infinitely many solutions.
What will be an ideal response?