3. A rectangle has a length of (2 + 5) centimeters
and a width of (3 − 1) centimeters. Which of the
following expressions must represent the area, in
square centimeters, of the rectangle?
(A) 5 + 4
(B) 6
2 − 10
(C) 5
2 − 7 − 4
(D) 6
2 + 13 − 5
(E) 6
2 + 15 − 5

a function could be identified in 3 ways either on a chart,graph, or ordered pairs. first a function is that each point has its own. the rule is that there can be many x's to one y but there can not be 2 x's at different y's. so on a graph when you put a straight line through the y's there should be one dot only to be a function.

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.