Answer:
2nd choice: The ball first bounced up to the height of 2 meters, and then falls 2 meters towards the ground
Step-by-step explanation:
The area of triangle ABC is the amount of space on the triangle
The area of the triangle is 54.84 square units
<h3>How to determine the area of triangle ABC</h3>
Start by drawing the triangle (see attachment)
Next, calculate the measure of angle B using the following tangent ratio

This gives

Take the arc tan of both sides

Multiply by 2

Next, calculate the length of side AD using the following equation

This gives


The area of the triangle is then calculated as:

This gives


Hence, the area of the triangle is 54.84 square units
Read more about areas at:
brainly.com/question/24487155
Answer:
A. there is a 99% probability that μ is between 3 and 9.
Step-by-step explanation:
From a random sample, we build a confidence interval, with a confidence level of x%.
The interpretation is that we are x% sure that the interval contains the true mean of the population.
In this problem:
99% confidence interval.
6 ± 3.
So between 6-3 = 3 and 6 + 3 = 9.
So we are 99% sure that the true population mean is between 3 and 9.
So the correct answer is:
A. there is a 99% probability that μ is between 3 and 9.
ten tens are one hundred and then they both have 4 tens or forty
Width = 4ft
Length = 6ft
<u>Explanation:
</u>
Let length = l ,
So, width = 2l-8
Perimeter of rectangle = 2x(length + width)
According to the question,

Hence,
Width = 4ft
Length = 6ft