Plsss help... from the Reflections chapter (Transformation geometry) What does that mean (the equations in the attachment)?

Assume that a population of 50 individuals has the following numbers of genotypes for a gene with two alleles, b and b: bb = 30, bb = 10, and bb = 10. calculate the frequencies of the two alleles in the population’s gene pool.

What is the value of x? enter your answer in the box. (cm)

Mr.zimmerman invested $25,000 in an account that draws 1.4 interest, compouneded annually. what is the total value of the account after 15 years