What represents the # of protons in a nucleus of an atom

Fractions can be added and subtracted only if they're fractions. a. like b. proper c. improper d. unlike

The weights of players in a basketball league are distributed normally. the distance (d) of each player's weight (w) from the mean of 86 kilograms was computed as follows: d = |w - 86| if d is greater than 7 for approximately 5% of the players, what is the approximate standard deviation of the players' weights? a. 1.75 kilograms b. 3.5 kilograms c. 4.3 kilograms d. 7 kilograms

Sketch one cycle if the cosine function y=2cos2theta