If the total value of the coins is 36¢, what is the missing coin?

What is the simplified form of (3.25x10^3)(7.8x10^6) written in scientific notation?

The graph of a function f(x)=(x+2)(x-4). which describes all of the values for which the graph is negative and increasing? all real values of x where x< -2 all real values of x where -2

Aschool had an election where the candidates received votes in the ratio 1: 2: 3. if the winning candidate received 210 votes, how many total people voted in the election?