Graph the function.y = 5 cos (?x)
A. 
B. 
C. 
D. 
Answer: C
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 acceleration vector.r(t) = (9 cos t)i + (7 sin t)j
A. a = (9 cos t)i + (7 sin t)j B. a = (-9 cos t)i + (-7 sin t)j C. a = (-9 sin t)i + (-7 cos t)j D. a = (9 sin t)i + (7 cos t)j
Mathematics
Solve the quadratic equation using the most efficient technique (factoring, extracting square roots, completing the square, or the quadratic formula).x2 + x + 9 = 0
A. 
B. 
C. 
D. 
Mathematics
Evaluate the expression for the given values of the variables, if possible.-
m = 64
A. -8 B. -10 C. 8 D. Not an integer
Mathematics
Simplify the following. Leave answer as a power.939 ÷ 915
A. 1824 B. 99 C. 24 D. 924
Mathematics