Answer:
r=1
Step-by-step explanation:
First we need to know the length of each side of the triangle, so we use the formula of the vector modulus:

By doing so, we find:

With this we know that the triangle is not right, but, we assume the longest side as the hypotenuse of the problem.
As we have two equal sides, we know that the line between point |AB| and the center of the hypotenuse is perpendicular, therefore, we can calculate it using Pythagoras theorem:

Answer: 
Step-by-step explanation:
Given the right triangle in the image, you need to remember the following identity:

Observe the triangle. You can identify that:

Then, knowing these values, you can substitute them into
:

Finally, you have to solve for "x".
Therefore, the value of "x" rounded to the nearest tenth is:

Answer: 19.28 Meters
Step-by-step explanation:
We will find our units of conversion for this problem.
100 centimeters is equal to 10 meters.
So, we will divide 1,928 by 100 and we will see what we get.
1,928 ÷ 100 = 19.28
Our answer to the question is 19.28!
Carry on Learning!
Step-by-step explanation:
g(f(x)) = f(x) substituted in g(x)'s function.
g(3x^2 - x - 8) = 3x^2 - x - 8 + 5 = 3x^2 - x - 3.