What is 20.7 rounded to?

What is the angle a ray of light arrives at? What dies how much mean in math? What is five sixth divide one thrid? How many nickels were made in 2010? What is the slope of x 5? What is the name of the polygon with 21 sides? How many multiplication problems are there that equal 12? What is 0.25 percent of 520? What is 5012? What angle is bigger than 180 but smaller than 360? What is the result if dividing 48a3 plus 32a2 plus 16a by 4a? Is the quotient of two nonzero integers a rational number? How do you write 1 500 420? What is the flat surface of a three demensional figure in the shape of a polygon called? How do you convert 7 and 7 over 10 into fractional notation? What is 94 divided by 309? All squares are similar to each other? Why does water curve on the edges? How many significant digits does 0.003? How many straight edges are in a rectangular prism?