About 75% of the waste produced in the U.S. is recyclable. Micah's family has 40 pounds of trash. He wants to estimate how much of this trash is recyclable.

Question

find an equivalent ratio with 40 pounds of trash.

recyclable material (lb): 75 ?
trash (lb): 100 40

Answer 1

To find the equivalent ratio with 40 pounds of trash, we can set up a proportion using the information provided:

Recyclable material (lb) / Trash (lb) = 75 / 100

We know that the trash amount is 40 pounds, so we can substitute that in:

Recyclable material (lb) / 40 = 75 / 100

Cross multiplying, we get:

100 * Recyclable material (lb) = 40 * 75
100 * Recyclable material (lb) = 3000
Recyclable material (lb) = 3000 / 100
Recyclable material (lb) = 30

Therefore, Micah's family likely has about 30 pounds of recyclable material in their 40 pounds of trash.

Answer 2

of the 250 students at Moreland Middle School, 80% ride the bus to school. Monica wants to know the number of students that ride the bus.

Find an equivalent ratio where the total number of students is 250

bus riders: 80 ?
total students: 100 250

Answer 3

To find an equivalent ratio where the total number of students is 250:

Bus riders / Total students = 80 / 100

Given that the total number of students is 250, the ratio becomes:

Bus riders / 250 = 80 / 100

By cross multiplying, we get:

100 * Bus riders = 250 * 80
100 * Bus riders = 20000
Bus riders = 20000 / 100
Bus riders = 200

Therefore, Monica can estimate that 200 out of the 250 students at Moreland Middle School ride the bus to school.