If a_1=5a
1

=5 and a_n=a_{n-1}-1a
n

=a
n−1

−1 then find the value of a_4a
4

The graph below represents the number of dolphins in a dolphin sanctuary. select all the key features of this function.

The ksp expression for the system pbcl2(s) pb+2(aq) + 2 cl-(aq) is: [pbc12][pb+2][2cl-] [pb+2][cl-]2 [pb+2][2cl-]2 [pbcl2][pb+2][cl-]2 [pb+2][2cl-]2[pbcl2]

Points a, b, and c form a triangle. complete the statements to prove that the sum of the interior angles of triangle abc is 180