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Algebra: direct and inverse variations. Probability of event

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1. A shipping company is shipping cargo by truckloads. The number of miles per gallon the truck averages goes down as the weight of each load goes up.

What is the relationship between the miles per gallon and the weight of the trucks' loads(which variation describes the data)? Direct, Inverse, Direct as nth power, Joint or Regress

I first answered "direct" and was told that is wrong. Can you help me understand the most appropriate choice?

2. A solid metal object is dropped from an altitude of 14,400 ft. Not accountng for air resistance, what is the velocity after 10 seconds?

3. A certain machine requires a combo of two brass fittings. If the two are to fit together, the measurement of each must fall within two standard deviations of the mean. Measurements of both fittings fit a normal dritribution. What's the probability that the two fittings chosen at random will fit together?

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Solution Summary

The relationship between the miles per gallon and the weight of the trucks' loads is examined. Probability of an event drawn from a normal distribution are determined.

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1. The relationship between the miles per gallon and weight of truck's loads is inverse. When a variable is increasing while the other one is decreasing, ...

Solution provided by:
Chris Busu, PhD (IP)
Education
  • BSc, University of Bucharest
  • MSc, Ovidius
  • MSc, Stony Brook
  • PhD (IP), Stony Brook
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