Please help me and use laws of exponents​

Find the y-intercept and x-intercept for the equation 5x-3y=60 what is the y-intercept

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?

If you measured the width of a window in inches and then in feet with measurement would you have the greater number of units