Cara computes the mean and variance for the set 87, 46, 90, 78, and 89. She finds the mean to be 78. Her steps for finding the variance are shown below.
o2 - 187–7852 + (45–78)? +(90 - 78,2+(78–78,2 +(89 – 7832
5
2-(32)2 +
2 + (12)2 +0° +(11)
02 - 81-1024 + 144 +0 + 121
o2 = -678 = -135.5
What is the first error Cara made in computing the variance?
I’m

people went from manufacturing one object at a time by hand to manufacturing many objects in factories

answer: can and shows the work

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.

answer: an 8-foot rope is tied from the top of a pole to a

stake in the ground, as shown in the diagram

below

step-by-step explanation: