Use a calculator to find the approximate value of the expression rounded to two decimal places.cos 9
A. -0.99
B. -0.91
C. 0.91
D. 0.99
Answer: B
Mathematics
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If r(t) is the position vector of a particle in the plane at time t, find the indicated vector.Find the velocity vector.r(t) = (-5t2 + 12)i + 
j
A. v = (-10t)i - 
j
B. v = (-10)i + 
j
C. v = (-10t)i + 
j
D. v = 
i + (-10t)j
Mathematics
Determine whether the relation is a function.{(-7, 6), (-7, 8), (2, -5), (6, -7), (8, 8)}
A. Not a function B. Function
Mathematics
Evaluate the equation. 
What will be an ideal response?
Mathematics
Find the value(s) of the function, subject to the system of inequalities.Find the maximum and minimum ofz = 19x + 7y subject to x ? 0, y ? 0, 2x + 3y ? 6, x ? 10, y ? 5.
A. 190; 21 B. 225; 14 C. 225; 190 D. 35; 21
Mathematics