1.The speed limit on some interstate highways is roughly 110 km/h.

(a)What is this in meters per second? m/s

(b)How many miles per hour is this? mi/h

2. (a)A car speedometer has a 7% uncertainty. What is the range of possible speeds (in km/h) when it reads 110 km/h?

km/h (lowest)

km/h (highest)

(b)Convert this to miles per hour.

mi/h (lowest)

mi/h (highest)

3.State how many significant figures are proper in the results of the following calculations.

(a)(106.7)(90)(46.210)(1.01)

(b)(18.7)²

(c)(78.0 10²⁰)(3712)