Find the perimeter of theese asap good points

8. Find the circumference of both circles and add together.
6(3.14)=18.84
2(3.14)=6.28
18.84+6.28=25.12 <- answer

9.Find circumference using 4cm as radius and divide by 4. Then add 3 sides of rectangle.
4(2)(3.14)=25.12
25.12/4=6.28
6.28+3+3+4=16.28cm <- answer

10. Find circumference using 6cm as diameter, divide by 2. Then find radius of smallest circle by subtracting 6-4. Find circumference using 2 as radius, divide by 4. Then find diameter of biggest circle by adding 6+2. Find circumference using 8 as diameter, divide by 2. Add together circumferences plus 6
6(3.14)=18.84 18.84/2=9.42
2(2)(3.14)=12.56 12.56/4=3.14
8(3.14)=25.12 25.12/2=12.56
9.42+3.14+12.56+6=31.12 <- answer

I did the first three, good luck. Hope I helped.

First step is to get rid of the square root. remember that a square root is the same as raising to the (1/2) power. see below: multiply exponents per exponent rules to get: remember you subtract exponents from the denominator and add exponents in the numerator so: simplify further: so a is the correct choice. if you don't understand this google exponent rules and it will you understand. look at the image results.