What 2 types of rocks make up a large majority of the composition of earth's crust

Asequence {an} is defined recursively, with a1 = 1, a2 = 2 and, for n > 2, an = an-1 an-2 . find the term a241

What is the ratio of the change in y-values to the change in x-values for this function? a) 1: 13 b) 2: 5 c) 5: 2 d) 13: 1

25 ! the line of best fit is h = 5a + 86. predict the height at age 16. show your work.