Which of the following situations can be modeled by the equation n+0.50n-0.3n =1.2n, where n is the # of nickels originally in the jar?
a. amanda takes out 50% of the nickels in the jar on friday and adds a number of nickels that is equal to 30% of the remaining number of nickels in the jar on monday. there are 20% fewer nickels in the jar after monday than before friday.
b. amanda takes out 50% of the nickels in the jar on friday and adds a number of nickels that is equal to 30% of the original number of nickels in the jar on monday. there are 20% fewer nickels in the jar after monday than before friday.
c. amanda adds 50% of the original number of nickels to the jar on friday. the number of nickels amanda takes out on monday is equal to 30% of the new number of nickels. there are 20% more nickels in the jar after monday than before friday.
d. amanda adds 50% of the original number of nickels to the jar on friday. the number of nickels amanda takes out on monday is equal to 30% of the original number of nickels. there are 20% more nickels in the jar after monday than before friday.