It’s ok and btw you just need to be confident :)
Answer:
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Step-by-step explanation:
1. 
2.
<em>factoring 96</em>
<em>since
</em>
3. 
<em>using exponent rule -
</em>
<em>
</em>
4. 
<em>doing some simple simplification and
and 6=2*3</em>
5. 
<em>collecting the roots on one side and applying exponent rule</em>
6. 
<em>Applying exponents rule on all
and
</em>
<em>7.
</em>
<em>combining all powers of 2</em>
8. 
<em>Simplifying</em>
9. 
10. 
11. 
First we should write the total numbers:
12+8+6+4=30
then we should divide the number 30 by 360(because the pie chart is 360 degrees):

now we should multiply 12(the number of students who likes rock) by 12

the answer is 144 degrees