1. Bobby looks in his wallet and sees that he has 2 twenty dollar bills and 1 ten dollar bill. He goes to the store and the check out clerk tells him his bill is $46.37. If this is the case, how much change will Bobby receive? *
A) $3.63
B) $4.13
C) $4.63
D) Trick question, Bobby doesn't even have enough money to make the purchase

Rearrange the formula c^2 = a^2 + b^2 for b

Aword processing program requires a 7- digit registration code made up of the digits 1,2,4,5,6,7 and 9 each number has to be used and no number can be used mor than once how many codes are possible

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.