Their total bill for lunch was $56. toni paid the check with three twenty dollar bills. write an algebraic expression that represents the difference between how much toni paid and actual amount of bill. do not simplify.

The heaviest 16% of all men in weight weigh more than how many pounds ?

Wrote and expression for the difference of p and 4

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.