Answer:
To convert from degree to radian we multiply the angle by
π/180
To convert from radian to degree we multiply the angle by
180/π
5π/6,
Multiply by
180/π
=
5π/6 × 180/π = 5 × 30 = 150 degrees.
⇒5π/6 radian =150 degree.
In this question, the speed of the dolphin is already given, but the unit is different. The speed of the dolphin is given as 40 miles per hour and it has to be converted to feet per hour.
We already know that 1 mile = 5280 feet
Then
40 mile = 5280 * 40 feet
= 211200 feet
So the speed in feet per hour will be 211200 feet per hour. I hope the procedure is clear enough for you to understand. You can always use this method for solving similar problems without requiring any help from outside.
Isolate c by subtracting all sides by 4
Then divide all sides by -5
You should get
5 less than or equal to c less than or equal to 4
Hope this helped :)
