Solve the problem.A motorcycle and a car leave an intersection at the same time. The motorcycle heads north at an average speed of 20 miles per hour, while the car heads east at an average speed of 48 miles per hour. Find an expression for their distance apart in miles at the end of t hours.
A. 2t
miles
B. t
miles
C. 52
miles
D. 52t miles
Answer: D
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Find the value of d2y/dx2 at the point defined by the given value of t.x = sin t, y = 5 sin t, t = 
A. -10 B. 0 C. 10 D. -5
Round to the indicated place value.Round to the nearest hundredth: 1.776
A. 1.77 B. 1.79 C. 1.8 D. 1.78
An augmented matrix that represents a system of linear equations (in variables x, y, z and w if applicable) has been reduced using Gaussian elimination. Find the solution represented by the augmented matrix.
a. (–6, 7)
b. (–6, 5)
c. (–5, 6)
d. (5, –6)
Find all cube roots of the complex number. Leave answers in trigonometric form.125
A. 5 cis 90°, 5 cis 210°, 5 cis 330° B. 5 cis 0°, 5 cis 60°, 5 cis 120° C. 5 cis 45°, 5 cis 165°, 5 cis 325° D. 5 cis 0°, 5 cis 120°, 5 cis 240°