Find the perimeter of this semi-circle with diameter 62cm. Give your answer as an expression in terms of Pi

Please include the formula

Which best explains why this triangle is or is not a right triangle?

Jackie purchased 3 bottles of water and 2 cups of coffee for a family for $7.35. brian bought 4 bottles of water and 1 cup of coffee for his family for $7.15. how much does each bottle of water cost? how much does each cup of coffee cost? i need this done

Hurry which expression is equivalent to 3√x^5y?