HEL: Jerry's Cafe offers two kinds of espresso: single-shot and double-shot. Yesterday afternoon, the cafe sold 10 espressos in all, 30% of which were single-shot. How many single-shot espressos did the cafe sell?

1. 22

2. 1

3. 7

4. 18

step-by-step explanation

e2020 got it right

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step-by-step explanation:

whole numbers.

step-by-step explanation:

we are given the average monthly rainfall (in millimeters) model r(m) for the years 1900-2009 as a function of the month number m.

as we can see m is taken for the number of months for years 1900-2009.

we know that number of months can't be a negative number or decimal number or a fraction.

so, the number of months could be only positive whole numbers.

therefore, whole numbers is more appropriate for the domain of r.

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