Suppose you are testing the relationship between the size of a bowling ball, experience of the bowler, and number of pins knocked over. first, a professional bowls a 5 cm bowling ball and knocks over 1 pin, 3 pins, and 1 pin in 3 different trials. then, an amateur bowls a 50 cm bowling ball and knocks over 10 pins, 10 pins, and 10 pins in 3 different trials. thus you conclude that amateur bowlers knock over more pins than professional bowlers. what is wrong with this experiment and what can be done to correct it?

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?

Read the excerpt from the strange case of dr jekyll and mr. hyde what do dr. jekyll's thoughts reveal about him in this excerpt? [t]he inmates of my house were locked in the most rigorous hours of slumber, and i determined, flushed as i was with hope and triumph, to venture in my new shape as far as to my bedroom. i crossed the yard, wherein the constellations looked down upon me, i could have thought, with wonder, the first creature of that sort that their unsleeping vigilance had yet disclosed to he is jealous of those who can sleep through the night. he is revered for his scientific advances. he is interested in studying the movements of the stars he is proud and enthusiastic about his initial results.

Which expression demonstrates the use of the commutative property of addition in the first step of simplifying the expression (-1+i)+(21+5i)+0