Retired cell phones contain 2100 metric tons of copper, 46 metric tons of silver, 3.9 metric tons of gold, 2 metric tons of palladium and, 0.04 metric tons of platinum. Currently gold is at 1500 dollars an ounce. There are 16 oz in a pound, and 2000 pounds in a ton. How much is the gold worth in recycled cell phones

Iwant to know what 3g+5h+4g-2h is my teacher is too selfish to tell us

The table below shows the height of a ball  x  seconds after being kicked.  what values, rounded to the nearest whole number, complete the quadratic regression equation that models the data? f(x)  =  x2  +  x  +  0based on the regression equation and rounded to the nearest whole number, what is the estimated height after 0.25 seconds?   feet

Which of the following parabolas opens down?