A company has historical reasons to believe that 30% their customers will return to buy a second item. They colled a random sample of 250 recent orders an calculated the percentage who bought a second item. They hope that the percentage has increased due to a recent advertising campaign . HELP ASAP

i can answer this question sweetie!

step-by-step explanation:

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.

a

step-by-step explanation: