I think it's B. Because he spends his 300 dollars so he would have to subtract it will all the money he has spent.
It’s take about 43 minutes but in scientific notation it’s 0.00008233217279125351 light years.
<span>just sub in 7 for the variable n
r(7) = 0.009(7)
= 0.063</span>
13x-42=x2 yayayayqyyayaya
Sorry i need to ask a question