The circles are similar with the diameter of the smaller one being half the diameter of the large one. Then the circumference is also half the size.
53.38/2 = 26.69
Answer: 26.69 cm
30 tens + 2 ones = 32
Hope I helped :P
6) 1.6 x 10^-4 = 0.00016
7) diameter of the sun
8) water molecule
9) grain of salt
I believe it’s D, not sure though.
2(4 - 2r) = -2(r + 5)
First, divide both sides by -2. / Your problem should look like:
Second, regroup your terms. / Your problem should look like:
Third, add 4 to both sides. / Your problem should look like:
Fourth, add r + 5 + 4 to get r + 9. / Your problem should look like:
Fifth, subtract r from both sides. / Your problem should look like:
Sixth, subtract 2r - r to get r. / Your problem should look like:

Answer:
r = 9