It is recommended that 13-year old girls get 45 milligrams of vitamin c each day . the table shows the vitamin c content of three foods . what precentage of the recommended amount will ardis receive if she eats all of these foods in one day.

(answers)
a 2.22
b 6.00
c 270
d 600

Ariana starts with 100 milligrams of a radioactive substance. the amount of the substance decreases by 20% each week for a number of weeks, w. the expression 100(1−0.2)w finds the amount of radioactive substance remaining after w weeks. which statement about this expression is true? a) it is the difference between the initial amount and the percent decrease. b) it is the difference between the initial amount and the decay factor after w weeks. c) it is the initial amount raised to the decay factor after w weeks. d) it is the product of the initial amount and the decay factor after w weeks.