1. Test tomorrow! Get ready! The number one thing you will need to remember for the test is that if you have a quadratic equation with real coefficients and a negative discriminate then the roots will be imaginary conjugates. The second thing you will need to know is today's date.
2. The formula for the volume of a sphere is V=(4/3)πr^3. Watch this video.
3. The formula for the surface area of a sphere is A=4πr^2. Watch this video.
4. Now explore this applet.
5. Now solve problems 1 through 6 on page 547 to 548. Homework is problems 7, 8 and 9.
6. Some of you may ask the question, how do we know that these formulas are true. Our textbook Discovering Geometry relies upon experimentation to show that these formulas are true. But there is another way, see here.
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