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snow_tiger [21]
2 years ago
9

If a model car has a scale of 3in.: 5ft., what would be the length of the model be if the actual car was 15 ft. long?

Mathematics
2 answers:
Kamila [148]2 years ago
5 0

Answer:

120ft

Step-by-step explanation:

Viefleur [7K]2 years ago
4 0

set up the ratios:

3/5 = x/15

Cross multiply:

45 = 5x

Divide both sides by 5:

X = 9

The model would be 9 inches long

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Compared to last year, the population of boom town has increased by 25%. The population is now 6,600. What was the population la
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Answer:

5280people

Step-by-step explanation:

Given parameters:

Percentage increase of population  = 25%

Population now = 6600

Unknown:

Population last year = ?

Solution:

Let the population last year = y;

   Then;

   Percentage of last years population plus the population of last year should give us this year's population;

         (\frac{25}{100} of y) + y  = 6600  

           0.25y + y = 6600

            1.25y = 6600

                   y = \frac{6600}{1.25}   = 5280people

Last year, there was 5280people in the locality.

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3 years ago
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Step-by-step explanation:

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Determine what type of model best fits the given situation: Farmer Joe has 1,000 bushels of corn to sell. Presently the market p
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Answer:

C. Quadratic model

Step-by-step explanation:

Determine what type of model best fits the given situation: Farmer Joe has 1,000 bushels of corn to sell. Presently the market price for corn is $5.00 a bushel. He expects the market price to increase by $0.15 per week. For each week he waits to sell, he loses ten bushels due to spoilage. A. none of these B. exponential C. quadratic D. linear

Given:

The quantity of corn Farmer Joe has to sell = 1,000 bushels

The present market price for corn = $5.00 a bushel

The amount by which he expects the market price to rise per week =$0.15

The number of bushels lost to spoilage per week = 10

The price of the corn per bushel with time = 5 + 0.15×t

The amount of corn left with time= 1000 - 10×t

Where;

t = Time in minutes

Value of the corn = Amount of corn left × Price of corn

Value of the corn = (1000 - 10×t) × (5 + 0.15×t)

=(1000-10t) × (5+0.15t)

=5,000 + 150t - 50t - 1.5t²

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