The average speed of an object (in feet per second) is determined by the equation S=4√d , where d is the distance in feet the object is dropped. If a rock dropped from the top of a bridge reaches an average speed of 60 ft /sec, how high is the bridge?

The bridge i s 225ft high.

Step-by-step explanation:

The average speed is determined by the equation,

S = 4√d

Here S is the average speed and d is the height from where the object is dropped.

Average speed = 60 ft. per second

S= 4√d

60 = 4√d

√d = 60/4

√d = 15

d = 225ft.

The object is dropped from 225ft. height.

54 kilometers per hour

step-by-step explanation:

according to rules:

1 km = 1000 meter

which means that 1 meter = 1/1000 km

1 hour = 3600 second [ as 1 hour = 60 min = 60 *60 seconds ]

which means that 1 second = 1/3600 hour

therefore, 1 kilometer/hour =

thus to convert 15 meter per second to kilometer per hour, we multiply 15 to 3.6 kilometer/hour.

15 meter/second=   which is the required answer.

47.28 or 47.2857143

step-by-step explanation:

you just divide 331 by 7 and you get that answer. ( i think so tho)