Determine if the biconditional is true. if false, give a counterexample.
an angle is a right angle if and only if it is not obtuse.

false; m∠1 = 120°, ∠1 is not a right angle

false; m∠1 = 70°, ∠1 is not a right angle

false; m∠1 = 90°, ∠1 is not an obtuse angle

true

Apair of ordinary dice is rolled. what is the probability that each die will show a number higher than 4. 1. (1/36) 2. (1/12) 3. (1/6) 4. (1/4) 5. (1/3)

The radius of a sphere is 3 inches. which represents the volume of the sphere?

Astudy was interested in determining if eating milk chocolate lowered someone's cholesterol levels.ten people's cholesterol was measured. then, each of these individuals were told to eat 100g of milk chocolate every day and to eat as they normally did. after two weeks, their cholesterol levels were measured again. is there evidence to support that their cholesterol levels went down? how should we write the alternative hypothesis? (mud = the population mean difference= before - after)a. ha: mud = 0b. ha: mud > 0c. ha: mud < 0d. ha: mud does not equal 0