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Andrew [12]
3 years ago
10

40% of ? =240 can anybody slove it​

Mathematics
2 answers:
Sav [38]3 years ago
7 0

I am not sure about the answer.

vovangra [49]3 years ago
5 0

Answer: 600

Step-by-step explanation: Let's first rewrite this problem to say 40% of what number is 240.

To answer the question 40% of what number is 240, we translate the question into an equation. First we have 40% which we need to write as a decimal. To write 40% as a decimal, we move the decimal point 2 places to the left. Filling in the missing position with a zero, we get 0<em>.</em>4.

Next we have "of what number" which means times <em>x</em>, "is 240" equals 240.

Now we have the equation (0.40)(x) = 240.

Now to solve for <em>x</em>, since <em>x</em> is being multiplied by 0.40, we need to divide by 0.40 on both sides of the equation. On the left side of the equation the 0.40's cancel and we have <em>x</em>. On the right side of the equation we have 240 divided by 0.40 which is 600.

This means that x = 600.

This means that 40% of 600 is 250.

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B. Larger sample size and lower confidence level

Step-by-step explanation:

The margin of error of a confidence interval is given by the following formula:

M = z*\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

z is related to the confidence level. The higher the confidence level, the higher the value of Z.

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3 years ago
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The TV to have a 16:9 ratio and have a diagonal of 65 inches must have a length & width whose squares add to 4,225 (65 squared) and whose ratio length and width simplifies to 16/9.

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3 years ago
A store is instructed by corporate headquarters to put a markup of 25​% on all items. An item costing ​$24 is displayed by the s
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The manager's likely error is that he has put the selling price the mark up amount only i.e $2.9≈$3 instead of adding the mark up amount to the cost price.

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