I don’t understand plsss helppp

Which expression is equivalent to 4 square root 6 divided by 3 root 2

Evaluate-27 ^4/3/8 a) - 81/16 b) 81/16 c) 16/81

Maria donates a fixed amount, a, to a charity each month. if she donates $300 in 12 months, what is the equation for a? a. a + 300 = 12 b. a × 300 = 12 c. a × 12 = 300 d. a + 12 = 300 e. a + 32 = 100