Which is a valid prediction about the continuous function f(x)? f(x) ? 0 over the interval [5, f(x) ? 0 over the interval [–1, f(x) > 0 over the interval (–? , 1). f(x) < 0 over the interval (–? . –1)

Find the sum of the following series. round to the nearest hundredth if necessary.

The graph shows the prices of different numbers of bushels of corn at a store in the current year. the table shows the prices of different numbers of bushels of corn at the same store in the previous year. previous year number of bushels price of corn (dollars) 2 10 4 20 6 30 8 40 part a: describe in words how you can find the rate of change of a bushel of corn in the current year, and find the value. part b: how many dollars more is the price of a bushel of corn in the current year than the price of a bushel of corn in the previous year? show your work.

Ametalworker has a metal alloy that is 30? % copper and another alloy that is 55? % copper. how many kilograms of each alloy should the metalworker combine to create 90 kg of a 50? % copper? alloy?