If a submarine surfaced after a dive of 20 fathoms, how far was the round trip

Volume of cylinder with a radius of 8cm and height of 25 cm

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

Evaluate the expression for the given value of the variable 7a - 4a for a =8