Find the difference
6 3/5 - 2 1/4

a) 4 7/20
b) 2 1/4
c) 8 17/20
d) 6 3/5

Initially 100 milligrams of a radioactive substance was present. after 6 hours the mass had decreased by 4%. if the rate of decay is proportional to the amount of the substance present at time t, find the amount remaining after 24 hours. (round your answer to one decimal place.)

Answer this question, only if you know the answer. 30 points and brainliest!

Translate this phrase into an algebraic expression. 21 more than twice goran's savings use the variable g to represent goran's savings. need to know fast.