Find the mass of the surface S having the given mass density.S is the hemisphere 
the density at a point P on S is equal to the distance between P and the xy-plane.
Definitions:
Q42: Evaluate the iterated integral. <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB8680/.jpg" alt="Evaluate
Q51: Find an equation of the tangent plane
Q82: Calculate the iterated integral. <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB8680/.jpg" alt="Calculate
Q85: Use cylindrical coordinates to evaluate the triple
Q85: Find <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB8680/.jpg" alt="Find Select
Q101: Solve the differential equation using the method
Q108: Use the given transformation to evaluate the
Q110: Solve the initial-value problem. <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB8680/.jpg" alt="Solve
Q119: Which plot illustrates the vector field <img
Q126: Evaluate the iterated integral.Select the correct Answer