10 Answered Questions for the topic Math Modeling

06/01/18

math modeling...this is the only problem i keep getting incorrect!
An electric board determines its monthly bills for residential customers by charging a base price of $17.00 plus an energy charge of 13.21 cents for each kilowatt-hour (kWh) used. Write an equation... more
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Math Modeling Algebra

01/17/18

A car traveled 258 miles on 15 2/7 gallons of gas. How many miles per gallon did it get?
Need help writing answer as mixed number 
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Math Modeling

08/28/17

If a jet travels at a speed of 1903 mph, what is its speed in Mach units?
If a jet travels at a speed of 1903 mph, what is its speed in Mach units?
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Math Modeling Algebra

03/08/17

Suppose that y varies directly as the square root of x​, and that y=30 when x=25. Find x when y=36.
Suppose that y varies directly as the square root of x, and that y=30 when x=25. Find x when y=36.
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Math Modeling Population

04/29/16

Population decline problem - math modeling
The population of a country was 42 million in 2000 and the natural rate of the decline of the population was 3% per year. Also, let k(t) =e0.6t represent the net rate of growth of the population... more
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Math Modeling

04/29/16

Math modeling - room tempature change
Let y represent the temperature (in °F) of an object in a room whose temperature is kept at a constant 60°. The object cools from 100° to 90° in 10 minutes. A) Find an equation to model this... more
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Math Modeling Exponential Growth

04/29/16

Exponential growth of fruit flies
Suppose an experimental population of fruit flies increases according to the law of exponential growth. There were 100 flies at the end of the second day of the experiment and 300 flies at the end... more
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Math Modeling Differential Equations

04/29/16

solve the difference equation x_{n+2} - 4x_{n}= n
solve the difference equation x_{n+2} - 4x_{n}= n   with initial conditions: x_{0} = 0, x_{1} = 1/3
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Math Modeling

09/14/15

north carolina has a population of roughly 9,222,000 people and is 53,865 square miles in size. What is the density of the population?
 north carolina has a population of roughly 9,222,000 people and is 53,865 square miles in size. What is the density of the population?   Please show work.
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Math Modeling

09/25/14

$6000 deposit at an apr of 3% with daily compunding for 9 years
Use the compound interest formula for compounding ??? Ore than once a year to determine the accumulated balance after the stated period
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