What kind of mathematical tools do biologists and geologists usually use?

a. Accounting

c. Calculus

b. Statistics

d. Algebra

Answer: statistics.

Because they have to run a lot of experiments or measurements, and they try to find relations between variables to draw conclusions. And that is what statistic permits by using scatter-plots, statistics (means, standard deviations, among other), distributions, best-fit lines, and other.