Use the Midpoint Rule with four squares of equal size to estimate the double integral. 
Definitions:
Q8: Use cylindrical coordinates to evaluate the triple
Q9: Use Stoke's theorem to evaluate <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB8680/.jpg"
Q27: The helix <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB8680/.jpg" alt="The helix
Q33: Let <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB8680/.jpg" alt="Let Find
Q57: The solution of the initial-value problem <img
Q73: Find the area of the surface S
Q89: The slope of the tangent line to
Q104: Find the unit tangent vector <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB8680/.jpg"
Q126: Solve the initial-value problem. <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB8680/.jpg" alt="Solve
Q148: Use Lagrange multipliers to find the maximum