Question Help The Stock Market Alexander is a stockbroker. He earns 12% commission each week. Last week, he
sold $5,300 worth of stocks. How much did he make last week in commission? If he averages that
same amount each week, how much did he make in commission in 2011?
Last week, he made $
in commission

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.