If Adam orders a book from Store X, how much will he owe to the nearest cent? The tax rate only applies to the cost of the book.
Comparison of Online Bookstores
Store X
$17.00
6%
Store Y
$18.00
8%
Cost of book
Tax rate
Shipping.

HELP FAST! ILL GIVE BRAINLIEST TO WHOEVER ANSWERS FIRST
10% of cost of the book
FREE
O $17.16
$19.72
$21.53
$27.20

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.