Answer:
x= 105/4
x=4
Step-by-step explanation:
<u>Answers </u><u>with </u><u>Method</u><u>:-</u>
1) Multiply the length value by 100,000.


2) For this, divide the length value by 1000.


3) For finding the approximate value, just multiply the value of length by 1.609.


4) Multiply the given mass value by 100.


5) Multiply the given value by 10,000.


Since the beacons rotate together, the angular speed is constant.
From the time you see the first beacon, you have to wait for the lighthouse to make 120°, i.e. 1/3 of a whole turn.
So, if T is the time it takes for the lighthouse to make a whole turn, the interval between the first and the second beacon is T/3.
The interval between the second and third beacon is the amount of time it takes to the lighthouse to make the remaining 2/3 of a turn, so that you'll see the first beacon again. So, this time is 2T/3
So, the ratio is

So, the time between the second and third beacon is twice as much the time between the first two.
6b<42
b<7
4b+12>8
4b>-4
b>-1
b>-1 or b<7