TheOne

The class I'm in is a chemistry class. That I am sure of... I think... lol. Anyone know any of the problems?

You mean "arithmetic". Yeah I did spelling bee national champion. I also did those problems already but the only friends I have with the same study guide, I can't compare answers with because they don't prepare for any tests using practice problems. They just pray they get good grades. I still need some help.

I'm having some trouble with a couple of the practice problems from a study guide. Can anyone help? 1.)The area of a telescope lens is 4149 mm2. (a) What is the area of the lens in square feet (ft2)? ft2 (b) If it takes a technician 65 s to polish 175 mm2, how long does it take her to polish the entire lens? 2.) The volume of a certain bacterial cell is 1.98 µm3. (a) What is its volume in cubic millimeters (mm3)? mm3 (b) What is the volume of 105 cells in liters (L)? 3.) Convert 709.5 meters to centimeters. Is this right? 7.095 x 10^2 4.) The concept of ____ indicates the ability of a person to measure consistently. precision usefulness accuracy or statistically? 5.) Select the correct number of significant figures for 0.0230 one two three four five or six? Could you explain how you get each one? Thanks