Exam 8: Formulas, Proportion, and Variation

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Using the markup formula M = S - C, find the selling price (S)if the markup (M)is $21.50 and the cost (C)is $58.

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The distance formula is distance = rate × time. A cyclist enters a 50 km race. If the cyclist travels at an average rate of 33.2 kph, write an equation and solve to find how long will it take him to cross the finish line. Round to the nearest tenth.

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Using the formula , calculate the piston diameter, d, if the force, F, is 634 lb and P=1.27Fd2P = \frac { 1.27 F } { d ^ { 2 } } the pressure, P, is 175 psi (pounds per square inch).

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Find the missing value: P = 2l + 2w. Find P if w = 8 and l = 2.

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The formula for finding simple interest is I = PRT, where I is the amount of interest charged, P is the principal amount borrowed, R is the percent of interest charged, and T is the length of time of the loan. If the interest is $315, the rate is 7.2% and the time is 1341 \frac { 3 } { 4 } years, how much money was borrowed?

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Evaluate L=2C+1.57(D+d)+(Dd)24CL = 2 C + 1.57 ( D + d ) + \frac { ( D - d ) ^ { 2 } } { 4 C } if C=28C = 28 in., D=18D = 18 in., and d=8d = 8 in. This is the formula that finds the length of a belt that goes around two pulleys.

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Find the length of a rectangular work area if the perimeter is 64 in. and the width is 9 inches. Use the formula P = 2(l + w).

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Solve the given problem: If electrical resistance in ohms = voltage in volts ÷ current in amperes, find the resistance for a motor with a voltage of 12.4 volts requiring 2.4 amps.

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If distance = rate × time, how long did a trucker drive if she traveled 785.3 miles at 60 miles per hour?

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