There are four balls of the same size in a box. the balls are numbered 1, 2, 3, and 4. connie randomly picks up one ball, puts it back, and then randomly picks up one ball from the box. let x denote the sum of the numbers on the two balls she picked up. a. find the probability distribution and events corresponding to the values of x. b. obtain the cumulative distribution function of x. c. findp(3≤x< 7).

is means division by fractions

step-by-step explanation:

2x^2+5x+17

your welcome. : )

the answer is: d) o, f, and kr.

atomic radius of bromine (br) is 114 pm.

atomic radius of oxygen (o) is 73 pm.

atomic radius of fluorine (f) is 72 pm.

atomic radius of krypron (kr) is 112 pm.

the atomic radius of a chemical element is a measure of the size of its atom.

the atomic radius varies with increasing atomic number, but usually increases because of increasing of number of electrons.

the atomic radius decreases across the periods because an increasing number of protons, because greater attraction between the protons and electrons.