The answer is square root of 6.909877
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Multiply the original price by the percent of markup: 47x.045=2.115. Round: 2.115=2.12. Add original price and amount of markup: 47+2.12=49.12. Answer: $49.12 :)
Part a :1.875
Part b is :32
Let me know if I am wrong
Start with

Exponents have the highest priority, so we evaluate 3 cubed first:

Next, we have to solve parenthesis first: we have 27-8 = 19, so the expression becomes

Multiplications and divisions have the same priority, so we perform them as they appear:
, so the expression becomes

The six in the right is 10times more than the 6 on the left then the other way arounft