Question 1073388
p(x)=29.92e^-0.2x
21=29.92e^-0.2x
21/29.92=e^-0.2x
e^-0.2x=.70187
ln e^-0.2x=ln .70187
-0.2x ln e=ln .70187
x=ln .70187/-0.2=1.770035376 miles above sea level as the altitude of the balloon. &#9786;&#9786;&#9786;&#9786;