It depends on the level of rounding - or precision.
To the nearest thousand, it is 0
To the nearest hundred: 200
To the nearest twelve: 144 (eg answer to how many feet in 150 inches, rounded to a whole number?)
To the nearest ten: 150
To the nearest seven: 147 (eg answer to how many weeks in 150 days?)
150.20 rounded to the nearest ten would be 150.
150 dollars, rounded to the nearest dollar, is 150 dollars!
145 is the least number that can be rounded to 150.
An estimate of 150 would typically be rounded to the nearest ten, which is 150 itself. In some cases, it may also be rounded to the nearest hundred, which would be 200. The specific rounding method used would depend on the context and level of precision required.
150
150
150
The average speed would be 150 / 1.73 = 86.705 feet per second (rounded) or 59.117 miles per hour (rounded).
150
On earth, 150 kg of mass weighs 330.69 pounds (rounded)
7.413 (rounded)
150