Which of the following is the inverse of the relation {(1, 5), (2, 6), (1, 7), (4, 8)}?

a.
{(1, 5), (2, 6), (7, 1), (8, 4)}

b.
{(5, 1), (6, 2), (7, 1), (8, 4)}

c.
{(2, 6), (1, 5), (8, 4), (7, 1)}

d.
{(1, 7), (1, 5), (2, 6), (8, 4)}

What is the perimeter of a rectangular building that is 80 feet wide and 140 feet deep?

An octagonal prism has jow many lateral faces?

Astudent must have an average on five test that is greater than it equal to 80% but less than 90% to receive a final grade of b. devon's greades on the first four test were 78% 62% 91% and 80% what range if grades on the fifth test would give him a b in the course? ( assuming the highest grade is 100%)