A radial arm saw has a circular cutting blade with a diameter of 10 inches. It spins ar 2000rpm. If there are 12 cutting teeth per inch on the cutting blade, how many teeth cross the cutting surface each second?

What is a graph with a never ending line called?

The size of a certain cell is 2.5*10^-9m. another cell is 1.5*10^3 times larger. how large is the larger cell in scientific notation?

Look at the figure below: triangle abc is a right triangle with angle abc equal to 90 degrees. the length of ac is 5 units and the length of ab is 4 units. d is a point above c. triangle adc is a right triangle with angle dac equal to 90 degrees and dc parallel to ab. what is the length, in units, of segment cd?