Math Ii Exam Worksheet - Boulton Stats Review Page 2
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11Assuming k is a constant of variation, which equation represents a situation in which
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y varies jointly as a and b ?
k
A y =
ab
ka
B y =
b
ab
C y =
k
D y = kab
Ohm’s Law relates to a simple electric circuit and states:
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One circuit has a resistance of 8 ohms when the voltage is 48 volts and the current is
6 amperes. What is the resistance of a second circuit that has a voltage of 128 volts
and a current of 8 amperes?
F 120 ohms
G 64 ohms
H 16 ohms
J 28 ohms
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A farmer pumps water from an irrigation well to water his field. The time it takes to
water the field varies inversely with the rate at which the pump operates. It takes 20
hours to water the field when the pumping rate is 600 gallons per minute. If he
adjusts the pump so that it pumps at a rate of 400 gallons per minute, how long will it
take to water the field?
A 40 hours
B 15 hours
C 30 hours
D 12.5 hours
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