How do I calculate average time squared?

Could you explain why 2.5 is the correct answer ?

What is the difference in magnitude between something operating in nanoseconds and something operating in milliseconds?

A common unit for speed used in sailing is the knot (nautical miles per hour).  A nautical mile is about 1.15 regular miles.  Calculate how much further (in feet) a boat moving at 22 knots will travel in 5 minutes compared to a car moving at 22 mph during the same time.

The graph below illustrates a driving trip from the town of Goodfield to the town of Peoria. distance (in miles) 35 30 25 20 15 10 5 0 0 0.25 0.5 0.75 1 time (in hours) (a) How far apart are the two towns? miles (b) Find the slope of the linear graph. select units (c) What does the shape of the graph tell us about the trip? ---Select---

Suppose your speedometer has an uncertainty of 4.5 km/h at a speed of 92 km/h. If the speedometer has the same percent uncertainty when it reads 55 km/h, what is the highest speed, in kilometers per hour, that you might be going?    If the speedometer has the same percent uncertainty when it reads 55 km/h, what is the lowest speed, in kilometers per hour, that you might be going?

Estimate the number of steps you would have to take to walk a distance equal to the circumference of the Earth. (We estimate that the length of a step for an average person is about 18 inches, or roughly 0.5 m. The radius of the Earth is 6.38 x 106 m.) 105 steps 108 steps 1011 steps 1015 steps O 1020 steps

How do scientists define length in terms of meters?

A man walks 18.3118 m directed 45.1332 degrees from the positive x-axis, then he walks 26.6583 m directed 313.559 degrees from the positive x-axis, then finally he walks 18.0623 m directed 304.119 degrees from the positive x-axis. How far he is now from his starting point? Express your answers accurate to four decimal places. Enter only the numerical value

A man walks 15.7667 m directed 223.2164 degrees from the positive x-axis, then he walks 27.9801 m directed 17.5732 degrees from the positive x-axis, then finally he walks 14.6125 m directed 263.5131 degrees from the positive x-axis. How far he is now from his starting point? Express your answers accurate to four decimal places. Enter only the numerical value