It will take Dave 7 weeks to earn the right amount of money.
1 Pretzel and 5 Bags of Popcorn
(WORK SHOWN BELOW)
Step-by-step explanation:
3^2
18^2 in scientific notation
Unit price = $3.84/12 = $0.32
Ten percent of 640 is 64.
640/100=6.4
6.4*10=64.
There are many other ways to find this but that is the way I have always used :)
Hope this helps!