What does 5.46 x 12.9 equal?

Robin spent 25% more time on his research project than he had planned he’s been an extra h ours on the project which of the following expressions could represent the number of hours rob actually spent on the project

Graph the function =gx+2x3 and give its domain and range using interval notation.

What is the approximate mark up percentage rate before m equals $1740 marked up from p equals $19,422