Do the ones you can see ! thx! i can not do this stuff!

For #6 + #8 You just have to double the radius to get the diameter. So you add 6 cm and 6cm to 12cm and you know 8 because it is the same process just not a whole number.

10 is easier than it looks because the formula for the circumference is 2 times pie times the radius or simpler is the diameter times pie. So you times 7 by 2 and then pie which will give you 43.96

for b its (t) and c its (d)

step-by-step explanation:

points are handed out whenever you post answers.

brainliest answers are handed out by the person asking the question, so whether your answer is picked depends entirely on whether the asker bothers to pick

if you're asking about your rank, it depends on having a certain number of points and a certain number of brainliest answers. for example, at the time of this writing, i have 44338 points out of 15000 needed for the next (nearly triple the requirement! ) but i only have 24 out of 50 required brainliest answers. this number decays, meaning after a certain amount of time (i think about a month), the total number of brainliest answers you've earned doesn't count toward this total. (i've been stuck at the same rank for a long

the lesson to learn here is that you shouldn't worry about points or rank. chances are, no matter how good an answer you may provide, your efforts will go mostly unnoticed unless you focus on the newest/most active questions that get posted.