Leanne earned $400 and $500 in interest the last 2 years. how much interest must she earn this year so that her average earnings over the three year period is more than $600

Aye asap pls ! markin da brainiest too ! btw da step choices are all add, distribute, divide, n subtract

Over the course of the school year, you keep track of how much snow falls on a given day and whether it was a snow day. your data indicates that of twenty-one days with less than three inches of snow, five were snow days, while of the eight days with more than three inches of snow, six were snow days. if all you know about a day is that it is snowing, what is the probability that it will be a snow day?

Given the expression (7 ? 4i) ? (2 + 6i), perform the indicated operation and write the answer in the form a + bi.