Let $abcd$ be a parallelogram such that $ab = 10,$ $bc = 14,$ and $\angle a = 45^\circ. $ find the area of the parallelogram.

How do we determine if they are made with matter

"what factors influence the absorption of sunlight at earth's surface? "

On a test the graders have a mean of 77 and a standard deviation of 8. if we can approximate the distribution of these graders by a number distribution what percent of the students. a) scores higher than 77? b) should pass the test (grades > 60)? c) should fail the test (grades < 60)?