Where is a good website i can get great math notes from?

Julia is going for a walk through the neighborhood. what unit of measure is most appropriate to describe the distance she walks?

Suppose a pendulum is l meters long. the time,t,in seconds that it tales to swing back and forth once is given by t=2.01

Aplane intersects a pris paralel to the base of the prism. the cross section is a polygon wth eight sides. how many sides does the base of the prism have? a. 10 b. 8 c. 7 d. 9