The distance between r and t on the coordinate grid is units. (input whole numbers only.)

 the distance between the points R and T is 45 units.

Step-by-step explanation:  We are given to find the distance between the points R and T on the co-ordinate grid.

Distance Formula : The distance between the points (a, b) and (c, d) i given by

From the co-ordinate grid, we note that the co-ordinates of point R are (-30, 10) and the co-ordinates of point T are (15, 10).

Therefore, the distance between the points R and T is given by

Thus, the distance bewteen the points R and T is 45 units.

36 girls

step-by-step explanation:

the 48 boys is 4 parts of the ratio

divide 48 by 4 to obtain one part of the ratio

= 12 ← 1 part of the ratio

3 parts = 3 × 12 = 36 ← number of girls