Ken received his bank statement in the mail and checked it to verify his recent pay increase. Ken has direct deposit so his paycheck is sent electronically to his account . The previous month's pay was $5,320.10. Ken's account activity showed a $651.22 previous balance, checks of $5,211.39, ATM withdrawals of $250 and a service charge of $4.50. If Ken's new balance is $982.01, what increase in pay was direct deposited?

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.