Answer:
t = 0.00159 second
Step-by-step explanation:
since we setting the pressure to 0, we can rewrite the equation as
0= 0.004sin(2(pi)(270)t + (pi)/7)
Now solve for t
t = n/540 - 2/945
so the first time you would hear is the number(t) closest to 0.
if n = 0, then t is negative value. Which is false because t needs to be positive
if n =1, t is still negative.
it n =2, now t is positive and the value for t is 0.00159 sec.
