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tiny-mole [99]
3 years ago
12

4% of what number is 40?

Mathematics
2 answers:
Gekata [30.6K]3 years ago
5 0

Answer: 1,000

Step-by-step explanation: Well <em>percent</em> means over 100 so we know that 4% means the same thing as 4/100. <em>Of</em> means <em>times</em>, <em>what number</em> means <em>x</em>, <em>is</em> means equals, and <em>40 </em>means <em>40</em>.

So we have the equation 4/100 · x = 40.

Notice that 4/100 can be reduced to 1/25.

So rewriting our problem we have x/25 = 40.

To get rid of the fraction, we multiply both sides of the equation by 25 and we have x = 1,000.

Now let's check our answer back in the

original problem to see if it makes sense.

We have <em>4% of 1,000 is 40</em>.

Well we know that 100% of 1,000 would be 1,000 so 4% of 1,000 should be alot less than 1,000 so 40 seems to make sense.

I have also attached my own work in the image provided.

ladessa [460]3 years ago
4 0

Answer: 1000

Step-by-step explanation: you do 4% multiplied by x = 40

Multiplying both sides by 100 and dividing both sides by 4,

we have x = 40 × 100/4

40×100÷4

And you get 1000

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Now we will find the area between these curves drawn on the graph.

Area = \int_{-1.34}^{1.34}[f(x)-g(x)]dx=\int_{-1.34}^{1.34}[6x^{2}-(x^{2}+9)]dx

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