Let X = {x|x is a whole number less than 10} and Y = {−3, −2, 1, 3, 5, 7, 20}. Find X ∩ Y.

A. {−3, −2}
B. {−3, −2, 1, 3, 5, 7}
C. {−3, −2, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 20}
D. {1, 3, 5, 7}

answer: a

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.

7 is the median   7.875 is the mean

step-by-step explanation:

3,4,5,6,8,11,13,13

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step-by-step explanation: