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VLD [36.1K]
2 years ago
12

Jenny drove her tractor down a row of her cornfield. She drove at constant velocity of 34metersperminute down the row. The row w

as 680meters long. How long did it take for Jenny to drive down one-quarter of the row?
Mathematics
2 answers:
tamaranim1 [39]2 years ago
7 0

Answer:

5 mins

Step-by-step explanation:

680/4

=170 meters (quarter of 680m)

170/34

=5 mins

VikaD [51]2 years ago
3 0

If you move at a constant rate, you obey the law

d=st

where d is the distance, s is the speed and t is the time.

You know that your speed is 34 meters per minute, and that your distance is 680. We can solve the equation for the time and plug the values:

d=st\iff t=\dfrac{d}{s}=\dfrac{680}{34}=20

So, if you need to travel only one quarter of the distance, it will take 20/4 = 5 minutes

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A restaurant offers three sizes of coffee and four differerſt types of coffee.
Kruka [31]
<h3>Answer:  864</h3>

=======================================================

Work Shown:

There are,

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  • 4 types of coffee
  • 2 choices for cream (you pick it or you leave it out)
  • 2 choices for sugar (same idea as the cream)

This means there are 3*4*2*2 = 12*4 = 48 different coffees. We'll use this value later, so let A = 48.

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--------------

If you're curious why you multiply the values out, consider this smaller example.

Let's say you had 3 choices of coffee and 2 choices for a bagel. Form a table with 3 rows and 2 columns. Place the different coffee choices along the left to form each row. Along the top, we'll have the two different bagel choices (one for each column).

This 3 by 2 table leads to 3*2 = 6 individual table cells inside. Each cell in the table represents a coffee+bagel combo. This idea is applied to the section above, but we have a lot more options.

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