If you have 216 people and you bring back 10 every 2 weeks jow long until there all back

302.4 days

Step-by-step explanation:

You bring back 10 every 2 weeks, then the rate is:

R = (10 people)/(2 weeks) = (10/2) people per week = 5 people per week.

This means that you bring back 5 people per week.

Now, you have 216 people, and you bring back 5 of them each week, then the amount of people that you have as a function of time, w, in weeks, is:

P(w) = 216 - 5*w

You will have them all back when:

P(w) = 0

Then we can solve it for w:

P(w) = 0 = 216 - 5*w

5*w = 216

w = 216/5 = 43.2

the time is 43.2 weeks.

We could write this in days, because we know that each week has 7 days, then 43.2 weeks is equal to 43.2 times 7 days, this is:

(43.2)*7 days = 302.4 days

the first one

step-by-step explanation:

just id the test.

9 sandwiches per hour

step-by-step explanation:

when we have a rate, we want a 1 in the denominator

27/3 = 9

27 sandwiches/ 3 hours = 9 sandwiches/hour