What is the value of 5^3i^9

How to use order of operation in 20 divide by 4 multiply 5 = 1

Jamie went to home depot.she bought 25 bags of soil that cost $9 per bag.she bought 15 pots at $8 each,and she bought 23 bags of pebbles at $15 each.she used a coupon that gave her $5 off for every 100 dollars she spent.how much did jame pay at the end?

Factor the polynomial expression x6 – x3 – 20