Answer:
r= 7.14 (rounded to 2 decimal places)
Step-by-step explanation:
We have to solve this equation for the value of r. We will use distributive property and basic algebra to solve this.
Distributive property is a(b+c) = ab + ac
Now, the steps of solving are shown below:

Hence, value of r is 7.14 (rounded to 2 decimal places)
25% is the percent increase
The changed digit is the third to the left of the decimal point, so is in the hundreds place.
The value of 8 hundred is 5 hundred more than the value of 3 hundred. The second number is 500 more than the first.
A complement is angle that can be added to another to equal 90 degrees.
So two times the same number would equal 90.
90 / 2 = 45
The angle that is its own complement is 45 degrees.
Answer:
I can help you with this, i just need the actual questions.
Step-by-step explanation: