HELP Can someone help me with this math it’s to find the volume of a cone
Plz show step by step so I can learn from it
Plz give a real answer pllzzz

Jackie purchased 3 bottles of water and 2 cups of coffee for the family for $7.35. ryan 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?

On a string instrument, the length of a string varies inversely as the frequency of its vibrations. an 11-inch string has a frequency of 400 cylces per second. find the frequency of a 10-icnch string.

3x = 729 solve for x plz . it's urgent. will mark