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kolbaska11 [484]
3 years ago
9

If one plane is flying at 40mph. While another is flying at 100mph. They are 200 miles apart, how long will it take them to coll

ide if they are going in the same direction
Mathematics
1 answer:
Paha777 [63]3 years ago
6 0

Answer:

1 and 3/7 hour

Step-by-step explanation:

Every hour they get 140 miles closer (100 + 40). So you divide 200 by 140 which gets you 1.42... or 1 and 3/7 of an hour.

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A stone is thrown horizontally with a speed of 15 m/s from the top of a vertical cliff at the edge of a lake. If the stone hits
pishuonlain [190]

Answer:

20 m

Step-by-step explanation:

We are given that

Initial horizontal speed ,u_x=15 m/s

Time, t=2 s

Initial vertical velocity, u_y=0

We know that

h=u_yt+\frac{1}{2}gt^2

Where g=-9.8m/s^2

Using the formula

h=0(2)+\frac{1}{2}(-9.8)(2)^2

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The negative sign indicates that the displacement of stone  is in downward direction.

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4 0
4 years ago
Patty measured the elementary school and made a scale drawing. The scale she used was 7 centimeters = 1 meter
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Write the scale of the drawing as a fraction. Put the shorter length in the numerator.

\frac{7 \: cm}{1 \: cm}  \\

First convert the denominator to the same units as the numerator. Write an equivalent fraction with centimeters in the denominator. Since 1 meter is equal to 100 centimeters, multiply the denominator by 100 to get centimeters in the denominator.

\frac{7 \: cm}{100 \: cm}  =  \:  \frac{7}{100}  \\

Write the scale factor as a ratio, using a colon

7/100   →  7:100

The scale factor is 7:100.

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#CarryOnLearning!

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