7/12 because it would come out to be 21/36, and the simplified version of that is 7/12<span />
21 8/9 because you need to make both fractions have a common denominator so you multiply the top and bottom of 1/3 by three to get 3/9 and then you add to get 21 8/9
Answer:
D isn't the correct answer. It's "It shrinks the graph vertically to 1/2 its original height."
Step-by-step explanation:
I'm not sure why though this is right because I graphed it, and I don't see how that could be the right answer.
Decibel is directly proportional to number of cars passing the point. That is,
69 db ----- 139 cars
x db ----- 17 cars
x = number of cars passing the point per minute on a weekend.
Then,
x= (69*17)/139 = 8.43 db ≈ 8 db