the arc length is calculated by the formula
then
or it can be calculated using the circumference of the circle since we have a semicircle the circumference 2πr must be divided by 2 С=2πr:2=πr =8π=<u>25,12</u>
4 friends evenly dividing up a n - slice pizza
So each one get
slices of pizza.
For example, if n = 12 slice then each friend gets 12/4 = 3 pieces. If Harris ate one slice less then he ate
=3 -1 = 2 pieces.
So the general expression for slices of pizza did Harris eat is

- First, to shift the graph of
1 unit to the right, so 
- Second, to shift the graph of
4 units to the left, so 
<h2>
Explanation:</h2>
To translate the graph of a function is part of Rigid Transformations because the basic shape of the graph is unchanged



In this case, we have the graph of:

And we need to translate it to make it the graph of:

According to our rules we need:
- First, to shift the graph of
1 unit to the right, so 
- Second, to shift the graph of
4 units to the left, so 
But
is the same as
, so the previous steps can be simplified as:
- Shifting the graph of
3 unit to the left.
Below are shown those graphs:
- The blue one is

- The red one is

<h2>Learn more:</h2>
Shifting graphs: brainly.com/question/10010217
#LearnWithBrainly
Its asking how much did they both spent, in total, in order to reach the same amount spent in part A
$1.40 - price from a supplier = 100%
100% + 80% = 180% = 1,8 - the retail price
1,40 * 1,8 = $2,52 - the retail price
100% - 25% = 75% = 0,75 - on sale for 25% off
2,52 * 0,75 = $1,89 - the sale price.