The garden club earned \$15$15dollar sign, 15 per hour by weeding neighborhood gardens for ttt hours. a generous donor has agreed to double their earnings. how much did the garden club earn in all?

Given that earning for 1 hour by weeding neightborhoods garden = $15

Then earning for 2 hours by weeding neightborhoods garden = $15*2= $30

Then earning for 3 hours by weeding neightborhoods garden = $15*3

Using same pattern earning for t hours by weeding neightborhoods garden = $15*t= $15t

Not it says that earning is doubled means you are getting 2*15 or $30 per hour

then new earning will be $30t in place of $15t

Hence final answer is $30t.

where are the choices?

proportions are fractions that equal to each other. so if two fractions are the same, they are proportional.

let's check the answers to see if they are proportional.

question a is not proportional because you can't turn 1.5/3 to 3/9. if you try to multiply 1.5/3 by 2 or 3, you wont get 3/9. it's impossible to make the fractions the same.

question b is not proportional because you can't turn 22/33 to 4/6. 33 can't go into 6.

question c is proportional because when you multiply 2 and 3 by 71, you would get 142/213, and those fractions equal to each other

question d is proportional because when you divide 14 and 7 by 2, you would end up with 7/3.5, and those fractions equal to each other.