Youngest to oldest (rock formation)

Which of the following is a way that advancements in technology improve humans' ability to measure air quality and protect human health?

The ratio of the measures of the three angles in a triangle is 14: 15: 11 find the measures of the angles

All of the following came out of china and were exchanged along the silk road, except a. papermaking b. block printing c. buddhism d. compasses select the best answer from the choices provided a b c d