Let U = { x∈ N : x ≤ 8}, A = { x∈ N : 5< x2 < 50} and B = { x ∈ N : x is a prime number less than 10 }. Verify that.

(i)(A ∪ B)′ = A′ ∩ B'

(ii) (A ∩ B)′ = A′ ∪ B′

Human body temperatures have a mean of 98.20° f and a standard deviation of 0.62°. sally's temperature can be described by z = 1.4. what is her temperature? round your answer to the nearest hundredth. 99.07°f 97.33°f 99.60°f 100.45°f

Find the perimeter of the triangle with vertices  d(3, 4),  e(8, 7), and  f(5, 9). do not round before calculating the perimeter. after calculating the perimeter, round your answer to the nearest tenth.  

What is the slope of the line (-7,2) (4,6)