Dana, neil and frank are siblings. dana is the oldest.

a. frank's age is one-fourth of dana's age. write an equation to represent frank's age (f) if dana's age is d years.

b. neil's age is one-half of the difference between dana's and frank's ages. write an equation to represent neil's age (n) in terms of dana's age (d).

c. use the equations to find neil's and frank's ages if dana is 16 year's old.

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.

step-by-step explanation: s