Answer:
495 students are at Lincoln Middle School
Step-by-step explanation:
450/?
450 = 90%
450*90% = 450 * 0.90 = 405
450- 405 = 45
450+45 = 495
it is the 3rd one
b=42
a=81
Using the law of indices
5 X 5^-3
5^1-3
5^-2
