A) A rock concert registers at about 105 decibels and a jet engine at 140 decibels. How many more times the energy is produced by the engine compared to the speakers at the concert?
Use the order of operations to get a single number from these mathematical terms. If the answer is not a whole number, round to two places after the decimal.
Note: sqrt(...) means square root, / means division, ^ means exponentiation and * mean multiplication.
B) sqrt(7^2 + 1^2)
C) 8 - 4
D) 3(5+2) - 4/6*15 + 8(3/2)
Answers in the comments.