In a 30-60 right triangle the side opposite the 30 degree angle is half the length of the hypotenuse.
so RT= 10
Answer: C. 16.4
Concept:
Here, we need to know the idea of the distance formula.
The distance formula is the formula, which is used to find the distance between any two points.
Distance = 
If you are still confused, please refer to the attachment below for a clear version of the formula.
Solve:
<u>Given information</u>
(x₁, y₁) = (-3, 4)
(x₂, y₂) = (7, -9)
<u>Given expression</u>

<u>Substitute values into the expression</u>

<u>Simplify value in the parentheses</u>

<u>Simplify exponents</u>

<u>Simplify by addition</u>

<u>Convert square root to decimal and round the answer to the nearest tenth</u>

Hope this helps!! :)
Please let me know if you have any questions
Answer:
You can choose classes of amplitude 5 , it may give you a better representation of the data :
Step-by-step explanation:
It should last 9 days.
Hope this helped.