Answer:
part A is 120
Step-by-step explanation:
6 × 20 = 120
part B
Length of the median would be: a+b / 2 = 19+38 / 2 = 57/2 = 28.5
Answer:
The answer is 4.93827156*10^16 or 49,382,715,600,000,000
Step-by-step explanation:
It's closed under addition. You can take any two natural numbers you want, add them up and you'll get some other natural number (eg: 3 and 5 ---> 3+5 = 8)
it's not closed under subtraction. Sure 5-3 = 2 is a natural number but 3-5 = -2 is not a natural number
so that leads us to the answer being choice B
