The formula to find density is Mass/Volume
We have
Density =

Volume =

Hence
Mass = 7.8×10504 = 81931.2 gram
I’m guessing if you simplify this it’s gonna be x=6
I am pretty sure the correct answer is $146.75. Hope this helps!!!!!!!
You would input 10 as m into the equation
t= 0.05(10) +60
t=0.5+60
t=60.5