In order to select a sample of undergraduate students in the united states, a simple random sample of four states is selected. from each of these states, a simple random sample of two colleges or universities is then selected. finally, from each of these eight colleges or universities, a simple random sample of 20 undergraduates is selected. the final sample consists of 160 undergraduates. what sampling technique is being used?

i think c. but don't trust it.

step-by-step explanation:

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.

answer is 12345678900987654321234567890987654321

step-by-step explanation:

c

step-by-step explanation: