The box office center of a football stadium sold 78 tickets less than the all other box offices. how many tickets were sold by the box office center, if the total number of tickets sold was 520?

520/2=260 (Assuming there's only two box offices)

260-78=182

182 tickets sold by box office

221 tickets were sold by the box office center

Step-by-step explanation:

x: other box offices

x-78: box office center

total: 520 tickets

x+x-78=520

2x-78=520

+78          +78

2x=299

/2             /2

x=299

299 is the how many tickets the other box offices sold

so the amount of tickets the box office center sold should be

299-78

221

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.