Rounding to estimate the difference of 18.14 - 9.88

18.14 rounds to 18 because you look at the 1 and (0, 1, 2, 3, 4) tell you to round down.  That means 18.14 rounds down to 18

9.88 rounds to 10 because you look at the first 8 and (5, 6, 7, 8, 9) tell you to round up.  That means 9.88 rounds up to 10.

Now it's just simple math.  18-10 = 8

Step-by-step explanation:

i dont know it

step-by-step explanation:

dc=6 square root of 3 and ac is 12 square root 3

c and d

step-by-step explanation:

square root of 3/2 = 18/c

cross multiply to get 18*2=√3*c

36/√3 * √3/√3 = c

c= 36*√3/3

c=12√3