Answer:
• Assume Q is a mid point of line MY

• Then, MQ = YQ

The total number of students is 14+36, or 50. So the chance that a selected student is female is 36/50, or 18/25.
Step-by-step explanation:
log <base a> b = x
means
a^x = b
So
3^2 = x^2+7x+21
x^2 + 7x + 21 - 9 = 0
x^2 + 7x + 12 = 0
(x+3)(x+4)
x = -3 or -4
I think 10,000 not sure though