Arelay race is over 1 1/2 kilometers, and each runner on a team will run 1/4 of a kilometer. how many runners are needed for a team?

Number of runners needed = 1 1/2  /   1/4

= 3/2  /   1/4

= 3/2  *  4

= 12/2  = 6  runners (answer).

Conversion: 1 1/2 = 1•2+1=    3/2

                               ———

                                    2

Divide: 3/2 by 1/4 = 3/2 • 4/1 = 12/2 = 6

To divide one fraction by another, invert (turn upside-down) the second fraction, then multiply.

Or change to %  

1 1/2 = 150%     1/4 = 25%

150 divided by 25 = 6

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:

b) the dogs need to shift their focus to human scent.