Pete and his partner mike made a huge profit in their software business together this year and have decided to use $20,000 of the profit for a christmas donation to their favorite charities. each will contribute an amount proportional to the amount he invested in starting the business. the investment ratio of pete to mike is 4 :1 . how much money will mike get to donate to his charity?
a. $16,000
b. $5,000
c. $4,000
d. $3,000