Figure 3.13 lists the speeds of student runners. Find the average speed of the students by adding the speeds and dividing by five. If the group of students represent a group of atoms, what does the average speed represent?

average= 100

Finding the average of atomic weights would result in the average atomic weight for different isotopes of the same atom.

Step-by-step explanation:

add each weight,

=500

divide 500 by 5

500/5=100

the answer is 16ft

step-by-step explanation:

x= -3 and

step-by-step explanation:

to find the roots of a cubic, use division or factoring to find the factors then set equal to 0. as this is a difference of cubes, it factors into

where a is the cube root of .

here   this is 27 and the cube root of 27 is 3. so we write using the form:

.

set each factor to 0 and solve for x.

x-3=0

x=3

the quadratic expression does not factor and must be solved using the quadratic formula.

where a = 1, b=3, and c=9

this cubic has two complex roots.