"Carrot Cake" colored frosting can be made by mixing 50 drops of red food coloring and
45 drops of yellow food coloring into 1 cup of
white frosting. If Lexie is baking a cake that
needs 2.5 cups of frosting, how many drops
of yellow food coloring will she need?

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.