The ratio of red to blue counters is 2:5 and there are 40 blue
counters. When I remove some red
counters the ratio is now 1:4. How
many red counters did I remove?

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?