I'm not for sure but I think it might be 4409 to the -6 so 4409^-6. I haven't done these in a while so I might be wrong!
Answer:
9 x 9 =81
Step-by-step explanation:
Answer:
Price of Caleb's groceries before tax= $6.4
Step-by-step explanation:
Let price of groceries before tax be = $ 
Sales tax % = 2.5%
Sales tax applied = 
Actual sales tax paid = $1.60
∴ 
Multiplying both sides by 100.


Dividing both sides by 25.


∴ Price of groceries before tax= $6.4