A box contains balls numbered 1 through 9. We randomly pick a ball, put it back in the box, and then pick a second ball.

What is the probability that the two balls have the number 1 on them?

i'm going to search 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.

$5.41

step-by-step explanation:

$20 - $14.51 = $5.49.