The approximate height, h, in meters, traveled by golf balls hit with two different clubs over a horizontal distance of d meters is given by the following functions:
seven-iron: h=-0.002d^2 + 0.3d
nine-iron: h= -0.004d^2 + 0.5d

a) at what distances is the ball at the same height when either of the clubs used?
b) what is this height?

a) 100 metres

b) 10 metres

Step-by-step explanation:

Given: the approximate height, h, in meters, travelled by golf balls hit with two different clubs over a horizontal distance of d meters is given by the functions:

To find: distances when the ball is at the same height when either of the clubs  are used. Also, to find this height

Solution:

(a)

(b)

Put d = 100 in

$12. that is my answer.

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