Step-by-step explanation:
the number of students =24
number of boys =8
to have in fraction
8/24 = 1/3
Answer:
$30.60
Step-by-step explanation:
Please write that as 70%.
The total is the original price plus 70% of that price, or
100% plus 70%, or
170%
Change 170% to 1.70 and multiply the original price by that:
Total price including markup: 1.70($18) = $30.60
Part B seems to be missing, but I think I have enough information to be able to answer.
Let's say we had two numbers x and y. Let x be rational and y be irrational.
If x is some nonzero number, then x*y is irrational. The proof for this is a bit lengthy so I'll leave it out.
For instance,
x = 2 is rational, y = sqrt(3) is irrational, x*y = 2*sqrt(3) is irrational.
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If we made x = 0, then
x*y = 0*y = 0
This is true for any value of y that we want. The y value doesnt even have to be irrational. It can be any real number.
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So the distinction is that if x = 0, then x*y = 0 is rational since 0 is rational. Otherwise, x*y is irrational.
