Please i need help i was supposed to do this hours ago, but i fell asleep.

What is the percent of increase for a population that changed from 438,000 to 561,000

What are the sotions to the quadratic equation 9x^2=4

1c) the number 131 is a term in the sequence defined by the explicit rule f(n)=5n-4. which term in the sequence is 131? 2a) write the first four terms of the function f(n)=n^2-1 2b) what is the 10th term of the sequence defined by the explicit rule f(n)=n^2-1 2c) the number 224 is a term in the sequence defined by the explicit rule f(n)=n^2-1. which term in the sequence is 224?