Which dating method provides dates between 40,000 and 100,000-300,000 years ago, and enables us to determine the date when ancient pottery fragments were last fired, or when burnt-flint artifacts last were heated?

The variable z is directly proportional to x, and inversely proportional to y. when x is 4 and y is 13, z has the value 1.2307692307692. what is the value of z when x= 9, and y= 20

Kapil needed to buy a long wooden beam. he went to two sawmills that each charge an initial fee plus an additional fee for each meter of wood. the following equation gives the price (in dollars) of a wooden beam from the first sawmill as a function of its length (in meters). p = 5+20xp=5+20x

Ineeeeed this is due tomorrow and i dont know the answer can you find all the exponents