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gogolik [260]
3 years ago
13

Sam drove 220 miles on 8 gallons of gas. find the unit rate.

Mathematics
2 answers:
zmey [24]3 years ago
7 0

Answer:

27.5

Step-by-step explanation:

nikdorinn [45]3 years ago
3 0

Answer: I got 27.5

Step-by-step explanation:

This is a fraction equal to

220 miles ÷ 8 hours

We want a unit rate where

1 is in the denominator,

so we divide top and bottom by 8

220 miles ÷ 8

8 hours ÷ 8

=

27.5 miles

1 hour

=

27.5 miles

hour

= 27.5 miles per hour

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Faced with rising fax costs, a firm issued a guideline that transmissions of 10 pages or more should be sent by 2-day mail inste
Volgvan

Answer:

a) The calculated value   t =  5.903 > 2.572 at 0.01 level of significance

Null hypothesis is rejected at 0.01 level of significance

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b) p - value  0.00001

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Step-by-step explanation:

<u><em>Step(i):-</em></u>

Given mean of the population = 10

Sample size 'n'= 35

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Standard deviation of the sample 's' = 4.45

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<u><em>Step(ii)</em></u>:-

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<em>Alternative Hypothesis</em> : H₁ : μ < 10

Test statistic

                 t = \frac{x^{-} -mean}{\frac{S}{\sqrt{n} } }

                t = \frac{14.44-10}{\frac{4.45}{\sqrt{35} } }

               t =  5.903

Degrees of freedom = n-1 = 35-1 = 34

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There is a true mean value is less than 10

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p - value  0.00001

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