PLEASE HELP ME OUT I NEED THIS ASAP, IM USING ALL THE POINTS I HAVE FOR THIS QUESTION

Diane owes $387 to her brother. if she debits her bank account $161.25 a month to pay him back, how many months will it take her to pay off the debt?

Divide. reduce the answer to lowest terms.5 2/3 ÷ 3 1/9

Ascientist has 50 grams of a radioactive element. the amount of radioactive element remaining after t days can be determined using the equation (1) after two days the scientist receives a second shipment of 50 grams of the same element. the equation used to represent the amount of shipment 2 remaining after t days is 10) - 50 which of the following is an equivalent form of the expression for the amount remaining in shipment 2? what’s the answer?