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3 years ago

Saru is making some lemonade. He finds using 42 ml of lemon juice and 210 ml of water

Mathematics

1 answer:

Usimov [2.4K]3 years ago

5 0

Answer:

1/5

Step-by-step explanation:

There is five times as much water as lemon juice. So, for every part of lemon juice, there are five parts of water.

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Apple launches an ad campaign for iPhone 12. Managers want to know what is the % of social media mentions that have positive rea

Orlov [11]

Answer:

social media mentions do managers at Apple need to collect, if they want to get a margin of error of 2%

Sample size 'n' = 625

Step-by-step explanation:

Step(i):-

Given data Apple launches an ad campaign for iPhone 12

Managers want to know what is the % of social media mentions that have positive reactions to the new ad campaign

probability of positive reactions p = 1/2

Probability of negative reactions q = 1-p = 1/2

we know that $\sqrt{p(1-p}\leq \frac{1}{2}$

Step(ii):-

Given margin of error = 2 % =0.02

The margin of error is determined by

$M.E = \frac{\sqrt{p(1-p} }{\sqrt{n} }$

$0.02 = \frac{\frac{1}{2} }{\sqrt{n} }$

$\sqrt{n} =\frac{1}{2 X0.02}$

√n = 25

squaring on both sides, we get

n = 625

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2 years ago

-7x - 2y = 14 6x + 6y = 18 x = y =

Mrac [35]

Answer:

6(2) + 6(1) = 18

Step-by-step explanation:

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3 years ago

Kayla used 4/14 of her allowance to buy yogurt and 8/14 of her allowance to go skating. What fraction of her allowance does she

Monica [59]

4/14+8/14=12/14, so she has 2/14 left

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2 years ago

Find the common fraction equivalent -->

Naddika [18.5K]

11/90 hope this helps please give brainliest

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3 years ago

Th The Future Businesses leaders of America club is setting up a school store. Members plan to sell pens and pencils. A pen is $

coldgirl [10]

Step-by-step explanation:

Prices:

$C_{pen}=1.25$

$C_{pencil}=0.25$

Goal:

$n_{pen}=50$

$n_{pencil}=100$

$E=115$

Earnings for 50 pens and 100 pencils

$E=50*1.25+100*0.25=87.5$

As can be seen, they have to either rise the number of pens and pencils they would like to sell, or they will have to lower they goal of learning

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2 years ago