Dan is going swimming to get some exercise. which of the following is appropriate swim safety advice?

Write the function getkthdigit(n, k) that takes a possibly-negative int n and a non-negative int k, and returns the kth digit of n, starting from 0, counting from the right

For waves in the ocean, the medium of the waves is a. air b. water c. energy d. a passing boat

In which item is energy stored in the form of gravitational potential energy? a. a slice of bread b. a compressed spring c. an apple on a tree d. a stretched bow string