An element with a mass of 540 grams decays by 17.9% per minute. To the nearest minute, how long will it be until there are 90 grams of the element remaining?

It says factor each expression 49x-28?

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

Find an bif a = {3, 6, 9, 12) and b = {2, 4, 6, 8, 10).