Hello!
The formula for percentage increase is:
Percent Increase = {( New Value - Old Value) / Old Value × 100}
Substitute = {( 566.60 - 550) / 550 × 100]
Solve:
566.60 - 550 = 16.6
16.6 / 550 = 0.0301818182
0.0301818182 × 100 = 3.0181818182
You may round that to 3.1%
So, Mr. Dawkins' salary increased by about 3.1%
Answer:
The first one because all characteristics mentioned in other options makes an scalene triangle but the first option makes isosceles triangle.
The side lengths would be 19,21,23
19+21+23 = 63
So the longest side length would be 23.