Solve the problem.A 2100-lb car travelling uphill has a grade resistance of 
Use a tangent function to estimate the angle of the grade. Give your answer to the nearest tenth of a degree.
A. -8.2°
B. -4.1°
C. 8.2°
D. 4.1°
Answer: D
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Evaluate the integral. 
A. ex[x2 - 6x - 6] + C
B. ex[x2 - 4x + 4] + C
C. ex[x2 - 6x + 6] + C
D. 
x3ex - 2x2ex + C
Solve the problem.Consider a retirement savings account where the monthly contribution is $100 for the first 15 years, is increased to $225 for the next 15 years, and then is increased once again to $325 for the last 10 years. The APR is always 5.4% compounded monthly. What is the value of the account at the end of 40 years? Round your answer to the nearest cent.
A. $257,880.02 B. $255,975.42 C. $266,356.93 D. $281,406.16 E. $264,452.33
Find the zeros of f(x), given that one zero is k.f(x) = x3 - 7x2 + x - 7
k = 7
A. ±7, i B. -7, ±i C. 7, ±i D. ±1, 7
Graph the parabola and label the vertex. Find the y-intercept.y = x2 - 1
A. vertex (0, 1), y-intercept (0, 1)
B. vertex (0, -1), y-intercept (0, -1)
C. vertex (0, 1), y-intercept (0, 1)
D. vertex (0, -1), y-intercept (0, -1)