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3 years ago

A jogging track is 1/4 mile. Sara ran 14 laps.

Mathematics

2 answers:

dangina [55]3 years ago

5 0

Answer:

6 more laps

Step-by-step explanation:

iogann1982 [59]3 years ago

5 0

Answer:

Sarah need to run $1\frac{1}{2}$ more miles.

Step-by-step explanation:

In order to tell how much more she needs to run we need to find out how much she ran so far. Since we know that one lap is $\frac{1}{4}$ of a mile, and that she ran 14 laps we can easily find out how much she ran so far by multiplying $\frac{1}{4}$ by 14. And so we get......

$(\frac{1}{4} )(14) = \frac{14}{4} = 3\frac{2}{4} = 3\frac{1}{2}$

Now that we know how much she ran so far ( $3\frac{1}{2}$ miles), in order to find out how much more she has to run we just have to substract the distance she ran so far from the total distance she wants to reach (in our case 5 miles) . After doing this we get the answer which is......

$5 - 3\frac{1}{2} = \frac{5}{1} - \frac{7}{2} = \frac{10}{2} - \frac{7}{2} = \frac{3}{2} = 1\frac{1}{2}$

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3 years ago

The smallest object visible with your eyes is similar to the width of a piece of hair, which is 1×10−4 meters wide. Using an opt

Sloan [31]

Answer:

B. $5\times10^{2}$

Step-by-step explanation:

We are told that the smallest object visible with our eyes is similar to the width of a piece of hair, which is $1\times 10^{-4}$ meters wide.

Using an optical microscope, we can see items up to $2\times 10^{-7}$ meters wide.

To find the objects we can see with our eyes are how much larger than the objects we can see with an optical microscope, we can set an equation as:

$\frac{\text{The width of the object we can see with our eyes}}{\text{The width of the objects we can see with microscope}}=\frac{1*10^{-4}}{2*10^{-7}}$

Using the exponent rule of quotient $\frac{a^m}{a^n}=a^{m-n}$ we will get,

$\frac{\text{The width of the object we can see with our eyes}}{\text{The width of the objects we can see with microscope}}=\frac{1}{2}*10^{-4-(-7)}$

$\frac{\text{The width of the object we can see with our eyes}}{\text{The width of the objects we can see with microscope}}=0.5*10^{-4+7}$

$\frac{\text{The width of the object we can see with our eyes}}{\text{The width of the objects we can see with microscope}}=0.5*10^{3}$

$\frac{\text{The width of the object we can see with our eyes}}{\text{The width of the objects we can see with microscope}}=0.5*10\times 10^{3-1}$

$\text{The object we can see with our eyes}=5\times10^{2}*\text{The objects we can see with microscope}$

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3 years ago

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Answer:

Step-by-step explanation:

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Anettt [7]

Step-by-step explanation:

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