Hello, can someone help me for that?

Answer is 5/19

Step-by-step explanation:

First of all, we need to add all the boys up, so all the black, brown, blonde, and red-haired boys up because that would help us compare a specific amount of hair-colored boys with the rest of the other hair-colored boys. There are 15 red-haired boys, 12 blonde-haired boys, 5 brown-haired boys, and 25-black haired boys. Adding them would equal 57.

Next, we take the group of red-haired boys (15 kids), and we compare them with the whole boys in the yearbook (including themselves as well). This gives us 15/57 kids, but we need to put it into the simplest form, so if we divide by 3 (Both of them are multiples of 3) we get 5/19.

I hope this helps.

intensity of the vector is v= √37 ≈ 6.08 units and make angle ∡α ≈ 9.46° with east direction

step-by-step explanation:

required vector is consists of the two componentsvx= 2+4=6 units   and vy= 1 unit and vx ⊥ vywe will use pythagorian theorem to find intensity of the vector vv∧2 = vx∧2 + vy∧2 => v = √vx∧2 + vy∧2 = √6∧2 + 1∧2 = √36+1 = √37 ≈ 6.08 unitsthe angle ∡α between vector and east direction we wil find with tanαtanα = 1/6 => α = arc tanα = arc 1/6 => α ≈ 9.46°

hope this