How to round 750 to the nearest hundred

Seattle, washington is known for being rainy. one day last month, 8 inches of rain fell in 1 1/2 hours. what us the rate of the rainfall expressed in ft per plzzz write a proportion i will give you 100 points

The legs of a right triangle measure 6 meters and 8 meters. what is the length of the hypotonuse.

X^2/100+y^2/25=1 the length of the major axis is: a)5 b)10 c)20