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3 years ago

A train has 6 identical passenger cars that are each 18 m long.

Mathematics

1 answer:

Gnesinka [82]3 years ago

5 0

Answer:

59m

Step-by-step explanation:

No of passenger cars in the train = 6

length of each passenger cars = 18m

total length of 6 passenger cars = 18 * 6 = 108 m

length of caboose = 10m

total length of train when caboose is included = 108 m + 10 m = 118m

_____________________________________________

Let the length of truck be X m

given that length of train is twice of length of truck = 2*X

but length of train as found above is 118 m

this implies

2X = 118

X = 118/2 = 59m

Therefore length of truck is 59m

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3 years ago

An article presents voltage measurements for a sample of 66 industrial networks in Estonia. Assume the rated voltage for these n

kramer

Answer:

We accept the null hypothesis and conclude that voltage for these networks is 232 V.

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 232 V

Sample mean, $\bar{x}$ = 231.5 V

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Sample standard deviation, s = 2.19 V

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We use Two-tailed t test to perform this hypothesis.

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$|t_{stat}| > |t_{critical}|$

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3 years ago

A number raised to a negative exponent is negative. always never sometimes

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