Lucia wants to buy some posters over the internet. each poster costs $6.67 and has a shipping cost of $9.99 per order. if lucia wants to spend no more than $30 for her posters, which inequality shows the maximum number of posters, p, that she can buy? 9.99 − 6.67p ≤ 30, so p ≤ 2 9.99 + 6.67p ≤ 30, so p ≤ 3 9.99p + 6.67p ≤ 30, so p ≤ 4 9.99p − 6.67p ≤ 30, so p ≤ 5

6.9

step-by-step explanation:

simple math really

6 1/2 times 0.6 = 3.9

but if you are just doing 6 and not 6 1/2 then the answer is 3.6

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.