Help please thank you

Given that ot =5, xt=12, and ox= 13 is xy tangent to circle o at t? explain.

Damon makes 20 cups of lemonade by mixing lemon juice and water. the ratio of lemon juice to water is shown in the tape diagram. lemon juice\text{lemon juice} lemon juice water\text{water} water how much lemon juice did damon use in the lemonade? cups

Simplify using positive exponents only.