What is one way to compare fractions with unlike denominador

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?

You eat $0.85 for every cup of hot chocolate you sell. how many cups do you need to sell to earn $55.25

Compound inequalities. , i’m being timed