11. 5.0 x 10^24 molecules
liters

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?

Why is it so easy to buy on impulse and overspend with a credit card? what could you do to counteract this tendency?

Heather is a cashier. she can ring up 1212 customers in 99 minutes. at this rate, how many minutes does it take her to ring up 44 customers?