I)
The Midpoint M of the line segment AB is found using the Midpoint formula:

ii)
the slope of the line through A and B is found by the slope formula:

iii)
the product of the slopes of 2 perpendicular lines is -1, so the slope of the line perpendicular to the line through A and B is -1/(-1)=1
iv)
the equation of the line with slope 1, which contains point M(3, 9) is found by the slope point form equation of a line:
y-9=1(x-3)
y-9=x-3
y=x+6
Answer: y=x+6
Butter pecan: 25
Vanilla: 35
Chocolate: 50
The dotted line between 20 and 30 (butter pecan) will be nothing more than anything including 5. In this case, it is 25 counting up to 30.
The solid lines directly leading to a number will be that number, for instance, chocolate is 50.
Answer:

Step-by-step explanation:
<u>Given</u>
<u />
<u>Solution</u>
(1) Find the rate of the cube's edge length with respect to time at s=30:

(2) Find the rate of the cube's surface area with respect to time at s=30:

Therefore, the surface area increases when the length of an edge is 30 cm at a rate of
.
The solution to this question is 20.6666666