Calculus
posted by Salman .
Use linear approximation to estimate the amount of paint in cubic centimeters needed to apply a coat of paint 0.040000 cm thick to a hemispherical dome with a diameter of 60.000 meters

Volume sphere= 4/3PI r^3
Dv/dr= 4PI r^2
dv= 4PI r^2 dr= 4PI*900*.0004 m^3. That is a lot of paint. check my thinking