23 can round to 20 and 21 can also round to 20 so all u do is 20x20=400 so 400 is your estimated answer
3,989.237
A thousandth = 1/1000 = 0.001
Round 4th decimal place = 5
5 and over is rounding up and under 5 rounds down so it would be 3,989.237
Using pythag a^2+b^2=16^2
16^2=256
and since a=b the equation is 2x^2=256
/ each side by 2
x^2=128
x=sq rt of 128=11.31 roughly
The answer to the question is
B. The north restaurant can expect to have 20 fewer morning visitors than the south restaurant.
Hope this helps!
