There are 4 new books and 7 used books on a shelf. (a)what is ratio of all books on the shelf to used books?

(B) what is the ratio of new books to all books on shelf

a= 11:7

b= 4:11

Step-by-step explanation:

all books= 11

new= 4

used= 7

answer: given that the roller coaster can accommodate 1600 riders per hour, thus the roller coaster can accomodate 1600 / 60 = 26.67 riders per minute.

given that there are 345 people in the line, the number of minutes it will take for the 345 persons to get into the roller coaster is given by 345 / 26.67 = 12.94 minutes.

therefore, it will take you 12.94 minutes to get to the front of the line.

step-by-step explanation: