Suppose a certain combination lock requires three selections of numbers, each from 1 through 25.(a)How many choices are there for the first number in the combination?How many choices are there for the second number in the combination?How many choices are there for the third number in the combination?How many different combinations are possible?

When you answer this can you explain

When are triangles considered similar? a. corresponding angles are equal andcorresponding sides are proportionalb. corresponding angles are proportional andcorresponding sides are equalc. corresponding angles are equal orcorresponding sides are proportionald. corresponding angles are proportional orcorresponding sides are equal select the best answer from the choices providedmark this and retumsave and exitnext

David leaves his house to go to school. he walks 200 meters west and 300 meters north. how far is david from his original starting point?