Lance has 70 cents, Margaret has three-fourths of a dollar, Guy has two
quarters and a dime, and Bill has six dimes. Who has the
most money?
a. Lance
b. Margaret
c. Guy
d. Bill

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.)

Which of the following graphs represents the function f(x) = 2^x

Some boys and girls were asked if they had a pet. one third of the group were boys. there were 20 boys. 20% of the girls had a pet. boys with a pet : girls with a pet = 1 : 5 i need to know how many girls there are.