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Alona [7]
3 years ago
11

A train traveled 300 miles in 5 hours. find its rate of speed in miles per hour.

Mathematics
1 answer:
melomori [17]3 years ago
8 0

Answer:

60 miles per hour

Step-by-step explanation:

Speed = \frac{Distance}{Time}

You divide 300 by 5 and you get 60. You always need to divide the upper part to the lower part to reach the distance in ONE UNIT OF TIME. There, you have 5 seconds, yet you need the distance in 1 second.

This all is assuming that the train moved at a constant speed, where

ACCELERATION = 0, which is pretty improbable for a train.

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Since it's a sample size, we use x, as the mean and s= standard deviation
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Given:  x =27, s = 2 and total sample = 32.
Probability that a recruit is at least 31 years old?

Let's calculate the Z score :
              _
         X - x              31 - 27
Z = ----------- → Z = -------- → Z = 2 (now look up in the Z score table,
           s                      2


Area (Z=2) =0.9772 , but Z ≥ 2  (at least) , then :
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7 0
3 years ago
Lester bought 6.73 pounds of bologna at the deli. Renee bought 1.41 pounds of bologna. How much more bologna did Lester buy than
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3 years ago
Evaluate the expression<br> 5(4)^2\20+9^2
arsen [322]
5 \times  \frac{ 4^{2} }{20} +9^{2} \\ \\ 5 \times  \frac{16}{20} + 9^{2} \\ \\ 5 \times  \frac{16}{20} + 81 \\ \\  \frac{80}{20} + 81 \\ \\ 4 + 81 \\ \\ 85 \\ \\ Answer: \fbox {85}
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3 years ago
Cuanto es 43x5-6 (dividido) 2=
nordsb [41]
212

I think that’s the answer
7 0
3 years ago
Candy and Tim share a paper route. It takes Candy 85 min to deliver all the papers, and it takes Tim 65 min. How long does it ta
RSB [31]

Answer:

The time required to finish the work by both candy and Tim working together = 36.83 minute

Step-by-step explanation:

Time taken by the candy to finish the work T_{1}= 85 min

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Thus the time taken by both to finish the work = \frac{T_1 \times\ T_2}{T_1 + T_2}

Put the values of T_{1} and T_{2}  we get ,

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Thus the time required to finish the work by both candy and Tim working together = 36.83 minute

3 0
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