Answer: see below
Step-by-step explanation:
15) π is approximately 3.14 and 19/6 is approximately 3.167, so π < 19/6
16) √81 is positive and -√121 is negative, and positive is always bigger than negative, so √81 > -√121.
'Larger than' or 'less than' is not just determined by the size (magnitude) of the number. The sign ( + or -) matters, too!
If there is a negative sign in front of the radical sign (the square root sign), then you take the positive root of the number under the sign, then put a negative in front of it.
17) same here. negative is less than positive, so -14/15 < √0.87
18) If we do the computations we get the three numbers are 1.875, √64 = 8, and -√121 = -11. The only negative is -11, so that is smallest. Between the other two, 8 is the largest. So, placed in order from least to greatest, we have --> -11, 1.875, 8
19) √67.4698 ≈ 8.214.
64.56/8.477 ≈ 7.616
And we are given 8.775
In order from least to greatest would be 7.616, 8.214, 8.775
Then - VERY important - answer back in the way they were given to you.
64.56/8.477, , 8.775
20) We are given 3 numbers and only one is negative, so that is the least (smallest) one. For the other two, let's get the decimal representations and compare them.
π ≈ 3.1416
= 3.25, exactly. We can see this is larger than π.
So, in order from least to greatest we have -15/5.8, π,
I hope this helps.