Luis rides his bicycle 34 mile in 15 minutes along the bike trail. Assuming he rides at a constant rate, what is his speed, in miles per hour? Hint: Its not three I got it wrong need help ASAP.

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?