Mr richardson would like to build a planter by a brick path

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

Shared decision making is always a positive strategy to take

The price of a visit to the dentist is \$50$50. if the dentist fills any cavities, an additional charge of \$100$100 per cavity gets added to the bill. if the dentist finds nn cavities, what will the cost of the visit be?