Which of the following are necessary when proving that the diagonals of a
rectangle are congruent? Check all that apply.
A. Opposite sides are perpendicular,
O
B. Opposite sides are congruent.
O
C. All obtuse angles are congruent.
D. All right angles are congruent

According to a study conducted in 2015, 18% of shoppers said that they prefer to buy generic instead of name-brand products. suppose that in a recent sample of 1500 shoppers, 315 stated that they prefer to buy generic instead of name-brand products. at a 5% significance level, can you conclude that the proportion of all shoppers who currently prefer to buy generic instead of name-brand products is higher than .18? use both the p-value and the critical-value approaches.