Answer:
D. taking two marbles from a box without replacing the first marble are dependent events

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Day 1:
5 haircuts @ $25.75 = $128.75
3 Color treatments @ $40.50= $121.5
Total =$250.25 per day
$250.25 x 6 days =$1,501.50
The amplitude and the period of the function are 3 and 2, respectively.
<h3>What are the amplitude and the period of a sinusoidal function?</h3>
Sinusoidal functions are periodic bounded functions whose form is described below:
y = A · sin (2π · t / T + Ф) + y'
Where:
- y' - Midpoint
- A - Amplitude
- t - Time
- Ф - Phase
- T - Period
The period is the horizontal distance between two consecutive peaks or two consecutive bottoms and the amplitude is equal to the half of the distance between a peak and a consecutive bottom. Hence, the amplitude and the period are, respectively:
Amplitude
A = 0.5 · [2 - (- 4)]
A = 3
Period
T = 2 · [0.75 - (- 0.25)]
T = 2
To learn more on sinusoidal functions: brainly.com/question/24336803
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Lois will sell her tee-shirt for $13.20
The percentage profit =
× 100
Profit = Selling price - cost price
Cost price is the total amount expended in making the tee-shirts
cost price includes cost of buying blank shirt , cost of fabric paint and amount Lois pay herself
cost of buying blank shirt = $1
cost of fabric paint = $1
amount Lois pay herself =
x $6
x $6 = $9
Total cost price = $1 + $1 + $9 = $11
0.2 = 
profit = 11 x 0.2 = $2.2
$2.20 = selling price - $11
selling price = $11 + 2.20 = $13.20
To learn more about selling price, please check : brainly.com/question/15533091?referrer=searchResults
The Slope is 5.
Use the slope formula m = y2-y1/x2-x1