Bacteria in a dirty glass triple every year. If there are 25 bacteria to start, how many are in the glass after 8 hours?
2 answers:
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Notice that the triangle is a right triangle, because of the right angle. By the Pythagorean Theorem, 
. Then 
, d. 8 m
Answer:
See below
Step-by-step explanation:
Here we need to prove that ,
Imagine a right angled triangle with one of its acute angle as .
- The side opposite to this angle will be perpendicular .
- Also we know that ,
And by Pythagoras theorem ,
Where the symbols have their usual meaning.
Now , taking LHS ,
- Substituting the respective values,
- From equation (i) ,
Since LHS = RHS ,
Hence Proved !
I hope this helps.