78 inches is the answer :-)
The domain and range of a function is the set of input and output values, the function can take.
- <em>The domain is [0,6]</em>
- <em>The range is [0,90]</em>
<em />
From the question, we have:

<u>The domain</u>
He cannot mow more than 6 yards a day.
This means that the domain is: 0 to 6
<em>This is properly represented as: [0,6]</em>
<u></u>
<u>The range</u>
When he mows 0 yards, his earnings is:

When he mows 6 yards, his earnings is:

This means that the range is: 0 to 90
<em>This is properly represented as: [0,90]</em>
Read more about domain and range at:
brainly.com/question/4767962
Answer:
n = 4/7
Step-by-step explanation:
Step 1: Write equation
8 = 14n
Step 2: Divide both sides by 14
n = 8/14
Step 3: Simplify
n = 4/7
<h3>
Answer:</h3>
a. -(3√13)/13
<h3>
Step-by-step explanation:</h3>
The cosine can be found from the tangent by way of the secant.
tan(θ)² +1 = sec(θ)² = 1/cos(θ)²
Then ...
cos(θ) = ±1/√(tan(θ)² +1)
The <em>cosine is negative in the second quadrant</em>, so we will choose that sign.
cos(θ) = -1/√((-2/3)² +1) = -1/√(4/9 +1) = -1/√(13/9)
cos(θ) = -3/√13 = -(3√13)/13 . . . . . matches your selection A