Solve.The force needed to keep a car from skidding on a curve varies jointly as the weight of the car and the square of the car's speed, and inversely as the radius of the curve. If a force of 
is needed to keep an 
car traveling at 20 mph from skidding on a curve of radius 
what force would be required to keep the same car from skidding on a curve of radius 
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Round your answer to the nearest pound of force.
A. 6911 lb
B. 7613 lb
C. 7043 lb
D. 7075 lb
Answer: C
Mathematics
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Evaluate the integral.
A. 
B. 
C. 115
D. 1035
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Use implicit differentiation to find d2y/dx2.xy - x + y = 6
A. 
B. 
C. 
D. 
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Provide an appropriate response.When solving a system of equations, you get x - 4 = x + 2. How many solutions are there?
A. No solutions B. One solution C. Infinitely many
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Write the expression in the standard form a + bi.Given z = 5 - 9i and w = 8 + 5i, evaluate 
.
A. 13 - 4i B. -3 + 14i C. 13 + 4i D. -13 + 4i
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