Use rational equations to solve the problems.A boat goes 150 miles downstream in the same time it can go 100 miles upstream. The speed of the current is 8 miles per hour. Find the speed of the boat in still water.
A. 32 mph
B. 25 mph
C. 48 mph
D. 40 mph
Answer: D
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Solve the problem.A bicycle wheel makes 4 revolutions. Determine how far the bicycle travels in inches if the diameter of the wheel is 23 in. 
Round to the nearest tenth.
A. 577.8 in. B. 72.2 in. C. 288.9 in. D. 92 in.
Find all values that make the rational expression undefined. If the rational expression is defined for all real numbers, so state.
A. x = 
, x = - 
B. x = 8
C. x = 40
D. Defined for all real numbers
The vertex of a parabola occurs where the derivative of its equation is 0, so an equation associated with the equation of a parabola can be solved to find the x-coordinate of the vertex. Find the vertex of the parabola, given the equation of the parabola and its associated equation.Equation of parabola: f(x) = x2 - 6x + 1; associated equation: 0 = 2x - 6
A. (3, 28) B. (-3, -8) C. (-3, 28) D. (3, -8)
Find the percent using a proportion. Round your answer to the nearest tenth if necessary.3.6 inches is what percent of 20 inches?
A. 5.6% B. 555.6% C. 18% D. 0.2%