Pls help this is asap!1!! Mrs. Werks wants to buy her daughters a new bicycle. The bike is originally $210 on sale for 25% discount. How much is the discount?

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

The graph represents the gallons of water in a water tank with respect to the number of hours since it was completely filled

An energy drink company claims that its product increases students' memory levels. to support its claims, the company issues advertisements claiming that 8 out of 10 people (chosen randomly from across the country) who tried their product reported improved memory. the missing component in this study is a .