Can ya'll help me pls

In the following situation, determine whether you are asked to determine the number of permutations or combinations. then do the calculation how many ways are there to pick a starting five from a basketball team of twelve members? a. permutation; ps - 2520 b. combination; 1c, - 792 c. combination: 2cs - 2520 d. permutation; ps - 95040

In the diagram, the ratio of ab to ae is (1/2) . what is the ratio of the length of to the length of ?

Find the quotient. 50a2 – 98b2 -5a +7b