Sound level b in decibels is defined as
b= 10 log (i/i)
where i = 1 × 10-12 w/m2 . the decibel
scale intensity for busy traffic is 80 db. two
people having a loud conversation have a deci-
bel intensity of 70 db.
what is the approximate combined sound
intensity?
answer in units of w/m2

Answer: it will take   4.36 seconds to reach her average velocity 10.69 miles/hour.explanation:   we have equation of motion ,where s is the displacement, a is the acceleration, u is the initial velocity and t is the time taken.average velocity = displacement/ time taken.average velocity = 10.69 miles/hr = 10.69*1.6*1000/(60*60) = 4.75 m/s4.75 = s/ts = 4. 1we also have acceleration = 2.18 m/s², initial velocity = 0 m/sso it will take   4.36 seconds to reach her average velocity 10.69 miles/hour.