2(3m^5)?=?m^10 missing exponent and coefficent ?? pls help

Tracy solved the following problem. which of the statements is true? 9 ÷ 3 + 6 × 2 3 + 6 × 2 9 × 2 18 her answer is correct. her answer is incorrect. she should have multiplied before dividing. her answer is incorrect. she should have multiplied before adding. her answer is incorrect. she should have added before dividing.

What is the perimeter of trapezoid jklm? + units 2 + + units 9 + units 9 + + units

Evaluate the expression for the given value of the variable 2×(c2-5) for c=4