Taylor is comparing the prices of two mattress cleaning companies. company a charges $30 per mattress and an additional $15 as service charges. company b charges $28 per mattress and an additional $21 as service charges. part a: write equations to represent company a’s and company b’s total mattress cleaning charges for a certain number of mattresses. define the variable used in the equations. part b: which company would charge less for cleaning 6 mattresses? justify your answer. part c: how much money is saved by using the services of company b instead of company a to clean 3 mattresses?

Company A: y= 30x +15 Company B: y= 28x +21

Company B will be cheaper for cleaning 6 mattresses. y= 30 (6) +15 -> y= 180+15

y=195.    B: y= 28(6) +21 -> y= 168+21 -> y= 189

C: $6 are saved for using company B.

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.