Please help with geometry problems

1. 3. can also be expressed as (22/7)

2. -4.5

3. 3.6

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if i put something wrong your not gonna like it so rather not say nothing.

the 8 in 8,420 is in the thousands place so it's value is 8 thousand.

the 8 in 6,870 is in the hundreds place so it's value is 8 hundred.

divide 8000 by 800 to find the answer:

8000 / 800 = 10

the 8 in 8,420 is 10 times greater than the 8 in 6,870

step-by-step explanation:

a'(12.5,11.25)

slope=(y1-y2)/(x1-x2)