Eric starts with 10 milligrams of a radioactive substance. the amount of the substance
decreases by each week for a number of weeks, w. he writes the expression
10(1)" to find the amount of radioactive substance remaining after w weeks.
andrea starts with 1 milligram of a radioactive substance. the amount of the substance
decreases by 20% each week for a number of weeks, w. she writes the expression
(1 – 0.2)" to find the amount of radioactive substance remaining after w weeks.
use the drop-down menus to explain what each part of eric's and andrea's
expressions mean.

answer: the value should be used for i in the formula of calculation the monthly payment , the interest rate per period is 0.85.

step-by-step explanation:

the given rate of interest i= 85%

in calculating the monthly payment for a loan with an interest rate compounded monthly, the value of the interest rate per period we use in the formula must be in decimal form.

to convert it in decimal, we divide it by 100, we get

hence, the value should be used for i in the formula of calculation the monthly payment , the interest rate per period is 0.85.

answer: 0.64

step-by-step explanation:

answer is because 4×10=40

and 98×4= is 392

40,392