John took 600mg of a medicine. Each hour, the amount of medicine in his body decreases by about 25%. Which function represents the amount of medicine in johns body after x hours A. f(x)=600(0.75)^x

B. f(x)=600-25x

C. f(x)=600(0.25)^x

D. f(x)=600-75x

Find the roots of the equation below. x^2 - 6 + 9 = 0

Marco has $38.43 dollars in his checking account. his checking account is linked to his amazon music account so he can buy music. the songs he purchases cost $1.29. part 1: write an expression to describe the amount of money in his checking account in relationship to the number of songs he purchases. part 2: describe what the variable represents in this situation.

Annabelle's homework is 75% it took her three hours how long should she estimate it will take her to complete her homework.