What did Rene Descartes make in math?

If a rectangle is 9cm by 11cm how long is the diagonal? What is equivalent to 4 12's? How the lead character tried to solve the problem? What is 50 * 34? What is the name of the division sign in math? What is the nearest width and length of 8 by 5 paper? Is one forth one quoter? How do you find out two fifths of something? What is 3 times 57? How many faces vertices edges does a rhombus? Is a parabola a graph of a function? Do stickers decomposable? When tossing a fair coin the probability of getting three heads in a row is? .7 meter equal how may inch? How do you round 43 to the nearhest ten? Is 250 percent less than or greater than 2.05? Two third of a commodity was sold at a profit of 5 and the remainder at loss of 2. if the total profit was rs 400.what aws the cost of commodity how to solve it? How many hundredths in 5 tenths? Which shape has four sides one pair of parallel lines and no right angles? Solve 4 multiply by the fraction 3OVER 5?