A total of 3600 athletes participated in the Singapore 2010 youth Olympic games there were 1200 media representatives who reported on the games 20 000 volunteers who helped out during the game and 370 000 was spectator who attended the games. Find the ratio of the number of media representatives to the number of athletes to the number of spectators.

There were 3,600 athletes and 20,000 volunteers.

Ratio of the number of athletes to the number of volunteers;

3,600 : 20,000

Taking that to the simplest form;

Divide by 100

3,600/100 : 20,000/100

36 : 200

Divide by 4

36/4 : 200/4

=> 9 : 50

3. parallelogram

step-by-step explanation:

we turn each of our sides into direction vectors

ab=b-a=(3 - 7, 1 - 0) = (-4, 1)

bc=c-b=(1,6)

cd=d-c=(4,-1)

da=a-d=(-1,-6)

we see how the opposite sides have negated direction vectors; this is characteristic of a parallelogram.   we have congruent sides ab=cd and bc=da with unequal lengths because 1^2+6^2 is different from (-4)^2+1^2.   so it's not a square or a rhombus.  

we check the dot product of direction vectors of adjacent sides.   we have

ab dot bc = -4(1) + 1(6) = 2

that's not zero so the sides are not perpendicular.   we've ruled out rectangle.

the direction vectors indicate two pairs of congruent parallel sides, so we choose parallelogram over trapezoid.