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3 years ago

What percent of 80 is 90?

Mathematics

2 answers:

Shkiper50 [21]3 years ago

7 0

72 is 90% of 80.

Explanation:

"Percent" or "%" means "out of 100" or "per 100", Therefore 90% can be written as

100

When dealing with percents the word "of" means "times" or "to multiply".

Finally, lets call the number we are looking for "n".

Putting this altogether we can write this equation and solve for

while keeping the equation balanced:

100

7200

100

Pie3 years ago

6 0

<h2>Answer:</h2>

112.5%

<h2>Step-by-step explanation:</h2>

100% = 80 - first, you have to write down, what is 100%

1% = 80/100 - than, you need to find out, what is 1% of 80

1% = 0.8

90/0.8 = 112.5% - last step is dividing 90 by 1% of 80

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3 years ago

Read 2 more answers

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:

Step(i):-

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

Step(ii):-

Null hypothesis: H₀: There is no sufficient evidence to support the claim that the bags are underfilled.

Alternative hypothesis: H₁:

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|

Degrees of freedom ν = n-1 = 19-1 =18

t₀.₀₂₅ = 3.19

Final 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

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Step-by-step explanation:

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