A rain gutter is to be made of aluminum sheets that are inches wide by turning up the edges 90. See the illustration. (a) what depth will provide maximum cross-sectional area and hence allow the most water to flow? (b) what depths will allow at least square inches of water to flow?.

If (a, b) is the solution to the system of equations shown above, and a and b are integers, then what is the value of a+b?

Explain how you might determine the rate of weathering on a sample rock

Afarmer began a new method of reducing grain spills. this reduced the number of mice on the farm. the number of snakes in the surrounding area decreased at the same time. the snakes depended on the mice that lived in the field. what’s the likely reason the snake population decreased? a. the number of snake predators increased. b. the number of mice increased. c. the number of mice decreased. d. the pesticides affected the snakes. e. a new breed of mice moved into the field.