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iVinArrow [24]
2 years ago
11

Population Growth Using 20th-century U.S. census data,

Mathematics
1 answer:
asambeis [7]2 years ago
5 0

The population of Ohio will be 10 million in the year 1970

The population growth of Ohio is represented by the function:

P(t)=\frac{12.79}{1+2.402e^{-}0.0309t}

P is the population in millions

t is the number of years since 1900

To find the year that the population of Ohio will be 10 million, substitute P = 10 into the function P(t) and solve for t

10=\frac{12.79}{1+2.402e^{-}0.0309t}\\\\10(1+2.402e^{-}0.0309t)=12.79\\\\1+2.402e^{-}0.0309t=\frac{12.79}{10} \\\\1+2.402e^{-}0.0309t=1.279\\\\2.402e^{-}0.0309t=1.279-1\\\\2.402e^{-}0.0309t = 0.279\\\\e^{-}0.0309t =\frac{0.279}{2.402} \\\\e^{-}0.0309t =0.116\\\\-0.0309t=ln0.116\\\\-0.0309t=-2.154\\\\t=\frac{-2.154}{-0.0309} \\\\t=69.7

t = 70 years (to the nearest whole number)

70 years after 1900 will be 1970

Therefore, the population of Ohio will be 10 million in the year 1970

Learn more here:  brainly.com/question/25504185

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30 pounds of raspberries and 50 pounds of blueberries are sold

<em><u>Solution:</u></em>

Let "a" be the pounds of raspberries sold

Let "b" be the pounds of blueberries sold

Cost per pound of raspberry = $ 1

Cost per pound of blue berry = $ 3.25

<em><u>Maya made $192.50 from selling a total of 80 pounds of raspberries and blueberries</u></em>

Therefore,

a + b = 80

a = 80 - b ------- eqn 1

<em><u>Maya made $192.50. Therefore, frame a equation as:</u></em>

pounds of raspberries sold x Cost per pound of raspberry + pounds of blueberries sold x Cost per pound of blue berry = 192.50

a \times 1 + b \times 3.25 = 192.50

a + 3.25b = 192.50 ------ eqn 2

<em><u>Let us solve eqn 1 and eqn 2</u></em>

<em><u>Substitute eqn 1 in eqn 2</u></em>

80 - b + 3.25b = 192.50

2.25b = 192.50 - 80

2.25b = 112.5

Divide both sides by 2.25

b = 50

<em><u>Substitute b = 50 in eqn 1</u></em>

a = 80 - 50

a = 30

Thus 30 pounds of raspberries and 50 pounds of blueberries are sold

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What is 218.4 rounded to the nearest whole number
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Answer:

It's 218, since 4 rounds below 5.

Step-by-step explanation: Please brainliest!

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How do i solve 1/2 × 3/7how do I solve one third of 3/7 <br><img src="https://tex.z-dn.net/?f=%201.5%20%5Ctimes%203.7" id="TexFo
Andrews [41]

1) \frac{1}{2}\,X\,\frac{3}{7}=\frac{3}{14}

2)  \frac{1}{3}\,X\,\frac{3}{7}=\frac{1}{7}

3)   1.5 \times 3.7\\=5.55

Step-by-step explanation:

We need to solve following expressions.

1) \frac{1}{2}\,X\,\frac{3}{7}

We need to multiply numerator with numerator and denominator with denominator

Solving:

\frac{1}{2}\,X\,\frac{3}{7}\\=\frac{3\,X\,1}{2\,X\,7}\\=\frac{3}{14}

It cannot be further simplified so,  \frac{1}{2}\,X\,\frac{3}{7}=\frac{3}{14}

2) one third of 3/7

one third stands for 1/3

Now solving:

\frac{1}{3}\,X\,\frac{3}{7}

We need to multiply numerator with numerator and denominator with denominator

\frac{1}{3}\,X\,\frac{3}{7}\\=\frac{3\,X\,1}{3\,X\,7}\\=\frac{3}{21}\\=\frac{1}{7}

It cannot be further simplified so,  \frac{1}{3}\,X\,\frac{3}{7}=\frac{1}{7}

3) 1.5 \times 3.7\\

In this question we have to multiply 1.5 with 3.7

1.5 \times 3.7\\=5.55

So, 1.5 \times 3.7\\=5.55

Learn More:

You can find more information about multiplication of fractions at:

brainly.com/question/2456302

brainly.com/question/2166248

Keywords: fractions, multiplication

#learnwithBrainly

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3 years ago
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