which is the correct reason why (x+y)⁶ is not equal to X² y'²A. the expression x²+y² is the product of two factors (x+y)(x+y) and (x+y)² is the SUM if two terms B. the expression x²+y² is the product of two factors (x+y) (x+y) and (x+y)² is the PRODUCT of two terms C. The expression (x +y)²is the product of two factors (x +y) (x+y) and x² +y² is the SUM of two terms D. the expression (x+y)²is the product of two factors (x+y(x+y) and x² +y²​

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.