Answer:
Step-by-step explanation:
4. angle 3= 117, angle 4 and angle 2=63
5. angle 4= 59, angle 1 and 3= 121
6. angle 2= 88, angle 1 and angle 3= 92
The slope of the line passing the coordinate point (0, 1) and (1,3) is 2
<h3>Slope of a line</h3>
The formula for calculating the slope of a line is expressed as:
Slope = y2-y1/x2-x1
Using the coordinate point (0, 1) and (1,3)
Slope =3-1/1-0
Slope =2/1
Slope =2
The slope of the line is 2
Learn more on slope here: brainly.com/question/3493733
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She should invest $30000 in the 9% fund and $10000 in the 13% fund.
<u><em>Explanation</em></u>
Suppose, the amount of investment at 9% rate is
dollar.
As the total amount of investment is $40000 , so the investment at 13% rate will be: 
So, the amount of earnings per year from 9% fund
dollar
and the amount of earnings per year from 13% fund
dollar.
Given that, the <u>total earnings per year is $4000</u>. So the equation will be......

So, the amount of investment at 9% fund is $30000 and the amount of investment at 13% fund = ($40000- $30000)= $10000
3^2 + height^2 = 9^2
9 + height^2 = 81
height ^2 = 72
height = sqrt(72)