Pure gold and silver have densities of 19,300 kg/m3 and 10,500 kg/m3, respectively. If a jeweler uses 0.25 cm3 of metal to make a ring, then how much heavier (in grams) is the gold ring compared to the silver ring?

The temperature of a chemical solution is originally 21 ? c . a chemist heats the solution at a constant rate, and the temperature of the solution 75 ? c after 1212 12 minutes of heating. the temperature, tt t , of the solution in ? c is a function of x , the heating time in minutes. write the function's formula.