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serg [7]
3 years ago
14

John made $20 for 2 hours of work. Sally made $50 for 4 hours of work. How do John and Sally's hourly pay rate compare?

Mathematics
2 answers:
olchik [2.2K]3 years ago
6 0
20/2= 10

John makes 10 dollars an hour.


50/4= 12.5

Sally makes 12.50 dollars an hour.

Sally makes more than John. 

I hope this helps!
~kaikers

vlabodo [156]3 years ago
3 0
John gets $10 per hour and Sally makes $12.50 per hour so Sally makes $2.50 more then John per hour.

We can tell John makes $10 per hour because we divid how much he made by the amount of hours it took to make to get 10 and we did the same thing for Sally ($50/4=12.5) and then we subtract Sally's pay per hour by John's pay per hour to see how much more Sally makes per hour. 

I hope that helped and made sense. :)
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A manufacturer of banana chips would like to know whether its bag filling machine works correctly at the 419 gram setting. It is
Dahasolnce [82]

Answer:

The calculated t- value = 1.09 > 3.19 at 0.025 level of significance

Null hypothesis is rejected

There is sufficient evidence to support the claim that the bags are underfilled

Step-by-step explanation:

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

Given the mean of the Population(μ)  = 419 grams

The sample size 'n' =19

Given mean of the sample x⁻ = 412

Given variance of the sample S² = 784

                                                 S = √784 = 28

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

<u><em>Null hypothesis: H₀</em></u>: There is no sufficient evidence to support the claim that the bags are underfilled.

<u><em>Alternative hypothesis: H₁:</em></u>

There is sufficient evidence to support the claim that the bags are underfilled.

Test statistic

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

                    t = \frac{412 -419}{\frac{28}{\sqrt{19} } }

                   t = -1.09

                 |t| = |-1.09|

<em>Degrees of freedom   ν = n-1 = 19-1 =18</em>

<em>t₀.₀₂₅ =  3.19</em>

<u><em>Final answer:</em></u><em>-</em>

The calculated t- value = 1.09 > 3.19 at 0.025 level of significance

Null hypothesis is rejected

There is sufficient evidence to support the claim that the bags are underfilled

                   

8 0
3 years ago
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madreJ [45]
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8 0
3 years ago
The box on the left is 8 inches wide and 8 inches tall what is the surface area of the box
TiliK225 [7]

Answer:

384 inches

Step-by-step explanation:

8 x 8 = 64

one face of the box is 64

6 faces of the box would be 384

6 0
3 years ago
Read 2 more answers
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kari74 [83]

Answer:

f(15) = 242

Step-by-step explanation:

Step 1: Define

f(x) = 2(4 - x)²

f(15) = x = 15

Step 2: Substitute and Evaluate

f(15) = 2(4 - 15)²

f(15) = 2(-11)²

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6 0
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