Answer:

Step-by-step explanation:
Given
Function; 
Required
Find an equation perpendicular to the given function if it passes through (-3,9)
First, we need to determine the slope of: 
The slope intercept of an equation is in form;

<em>Where m represent the slope</em>
Comparing
to
;
We'll have that

Going from there; we need to calculate the slope of the parallel line
The condition for parallel line is;

Substitute 

Divide both sides by -2


The point slope form of a line is;

Where
and 
becomes

Open the inner bracket

<em>Hence, the point slope form of the perpendicular line is: </em>
<em />
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The answer you are looking for is 46%
Answer:
5 percent per annum
Step-by-step explanation:
interest rate:
interest: $1800
principal: $18000
duration: 2 years
1800/ 18000 * 100
result is 10%
Since interest is 10% in 2 years, 10% / 2
interest is 5% per year.
Answer:
This means the mock-up tank has a volume 216 times smaller than the initial tank.
Step-by-step explanation:
The ratio between volume is given by

This means the mock-up tank has a volume 216 times smaller than the initial tank.