the first two professors did not know if everyone wanted coffee because the third professor had to choose yes or no if he wanted coffee. the first two professors were waiting for the third to say something, and when he said no, they knew he did not want coffee. if one of the first two professors said no, the answer would be no.
The answer above isn't right- lol.
15% of the animals in the zoo are birds.
[45/300 is .15, or 15%.]
Volume of a cone = pir^2h/3
so substitute what you know
1,102.14 = 3.14(r^2)(13/3)
divide by 3.14
351 = r^2(4.3333)
divde by 13/3
81 = r^2
r = 9 inches
Percent means parts out tof 100 so 15%=15/100
divide by 5/5
3/20=lowet terms
