Please help me with #10 and #11, will mark brainliest.

1jessica's home town is a mid-sized city experiencing a decline in population. the following graph models the estimated population if the decline continues at the same rate. select the most appropriate unit for the measure of time that the graph represents. a. years b. hours c. days d. weeks

Given δjkl : δxyz, find x. a)10 b)12 c)16 d)20

When you find the area of a triangle do you use in. or in2