This year the class plans to collect only one color of glass and use the money earned from recycling to pay the total cost of the field trip. The amounts and dollars the class weren’t 1 pound of each color of glass are the same they were last year. Select color of glass and determine how many pounds the class needs to collect and recycle to pay for the field trip. Explain how you found your answer. I’ll put pictures for you to understand more of the problem.

it should be a.

hope it

  or  

sin y = 7/q

7 is the opposite side length, q is the hypotenuse

tan y = 7/r

7 is the opposite side length, r is the adjacent side length

using sohcahtoa ^^^^

cos y = adjacent/hypotenuse

cos y = r/q

answer: $53750

steps:

list the principal and interest after the n-th year:

n       principal   simple interest

1     12500     375

2     25000     750

3     37500     1125

4     50000     1500

sum: $50000     $3750

total at end of year 4: $53750