Round 4,719,429 to the nearest 10,000

Suppose a gym membership has an initial enrollment fee of $75 and then a fee of $29 a month. which equation models the cost, c, of the gym membership for m months?

Given the diagram below, michael writes, "segment ac is congruent to segment ac." which of the following reasons allow him to write this statement?

At a book fair, joe bought 24 books at 3 for $5 and had $2 left. how much money did he have at first?