Ratna wrote that x plus x plus x is equivalent to x to the third power what error did she make

What is the measure of ac? 5 units 13 units 26 units 39 units 3x- 2b 6x + 9

Gravel is being dumped from a conveyor belt at a rate of 25 ft3/min, and its coarseness is such that it forms a pile in the shape of a cone whose base diameter and height are always equal. how fast is the height of the pile increasing when the pile is 14 ft high? (round your answer to two decimal places.) ft/min

Events a and b are independent. the probability of a occurring is 2/5. the probability of b occurring is 1/4. what is p(a and b)?