Question

Please help with this question, will be appreciated if there is an explanation

Answer 1

If they manage to sell
`t` tickets, they will earn
`15\cdot t` dollars. We want this number to be at least 1000, so the inequality would be

`15t>1000`

In order to solve this for t, you only need to divide both sides by 15:

`15t>1000\iff t>(1000)/(15) = 66.\overbar{6}`

So, they need to sell at least 67 tickets to have an income of

`15\cdot 67 = 1005` dollars