Pls 10 points and will give brainiest thx

Which expression is equivalent to (3^2)^-2 a.-81 b.-12 c.1/81 d.1/12

Jasmine wants to eat at 8: 00pm her meal takes 65mins to cook what time does she need to put the meal in the oven

Three times the sum of a number and seven is negative thirty-six. what is the number?