exam Maths Puzzle Numerical Ability

i have to find out when i answer this question is i have to round it to the nearest ten. heres the question if a=4 anb b=4 wat is c=? and one more question if b=7 and c=10 wat does a=? thank you for answering my questions.

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How do I convert the angle measure for display in a circle graph for 4 out of 5.

Thanks EXPRESS EACH IN SIMPLEST RADICAL FORM

question # 1- "the square root of 75x to the 12, y to the 5"
question # 2- "the 5 root of 96c to the 9 over the 5 root of 3c squared
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