I'm on this question too and all I know is store C is a better buy. I'm not very sure why but I'm pretty sure it is.
Inequality is
727.29-248.50+x<u>></u>500
x=how much she needs to deposit
478.79+x<u>></u>500
subtract 478.79 from both sides
x<u>></u>21.21
at least $21.21
Give them brainlest to give someone brainlest you need two people to answer your question so now that I commented you can now give them just wait for a while :)
100-r=99.52
First, add r to both sides.
100-r+r=99.52+r
And then simplify.
100=99.52+r
Then, subtract 99.52 from both sides.
100-99.52=99.52+r-99.52
And simplify.
0.48=r
So,
r=0.48
