Answer:
here look
Step-by-step explanation:
The principal square root is the positive number square root. Unless otherwise stated, "the square root" of a number refers ONLY to the principal square root.
56.06
58.84
-- 2.78
______
I don't really know how else to explain this, but there ya go! Goodluck on your test or whatever you're doing! Stay safe ♥♥♥
the first is a linear
second is an exponential
third is quadratic
4cm : 5km
xcm : 4km
Cross multiply.
4 * 4 = 16
5 * x = 5x
5x = 16
x = 16/5
x = 3.2km
3.2km : 4km