Paulo ran a marathon in about 1.56 × 10^4 s. a) write paulo's time in standard notation. b) miguel ran a marathon in 4 h and 16 min. who ran the race in the shorter amount of time? show your work. (question 2) solve each given equation and show your work. tell whether each equation has one solution, an infinite number of solutions, or no solution. explain your answers. a) 2x+4(x-1)=2+4x , (b) 25-x=15-(3x+10) , (c) 4x=2x+2x+5(x-x). (i posted a picture of question 3).