That would be referred to as a "speed".
It can also be described as "45 miles per hour", to which it is identically equivalent.
66 feet per second = 45 mph.
The ratio is 5280 feet in a mile / 3600 seconds in an hour. So 45 m/h * 5280 f/m / 3600 s/h = 66 f/s
45 mph = 66 feet per second
45 mph = 66 feet per second.
45 mph = 66 feet per second
45 x 5280 feet / 3600 seconds = 66 feet per second
5280 * 45 / 60 / 60 = 66 feet per second
45 miles per hour = 66 feet per second
About 660 feet per minute.
45 mph (5280 feet/1 mile)(1 hour/3600 seconds) = 66 feet per second
At 45mph a car will travel 66 feet per second.
66 and 2/3 feet per second