Answer:
Use ellipses. Zero solutions at bottom
a(x-b)^2 + c(y-d)^2 + e = 0
Two equations with different constants.
Step-by-step explanation:
I believe this answer is correct
I = 7.6*10^(-4) is the given intensity of the sound
Io = 10^(-12), which is a constant usually shown in a table or in your book
Plug in those values to get
B = 10*log(I/Io)
B = 10*log((7.6*10^(-4))/(10^(-12)))
B = 88.808135922808
B = 88.81
Answer: Approximately 88.81 decibels
C=

so
18.84=2*3.14r
18.84=6.28r
r=3

A=3.14*9
A=28.26 or when rounded is 28
Hope that helps