Null hypothesis and research hypothesis

Ablind girl lost her pencil, book and what did she lose first? (this is really good for people who don't have an adequate amount of points! )

In the artwork "that gentleman" by andrew wyeth how intense are the colors? what are their individual values and temperature?

Which scientist listed below is not one of those to advance the study of mathematics? a. euclid b. herodotus c. pythagoras d.archimedes