HELP how can south Korea improve or sustain a high living standard while ensuring a healthy climate?

True or false? a triangle can be circumscribed about a given circle

If you answer right ill give brainliest, : )

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.