A student reflected four points across the y-axis and recorded his work as sets of ordered pairs. Which set of ordered pairs has an error?
Original point Reflection across the y-axis
A (6,8)
B(1.)
cl(o,3)
D (3, 2)
6, 8)
(-1.1)
(0, 3)
(3, -2)
o Set A
O Set B
o Set C
o Set D

Helena lost her marbles. but then she found them and put them in 44 bags with mm marbles in each bag. she had 33 marbles left over that didn't fit in the bags.

Scores on a university exam are normally distributed with a mean of 78 and a standard deviation of 8. the professor teaching the class declares that a score of 70 or higher is required for a grade of at least “c.” using the 68-95-99.7 rule, what percentage of students failed to earn a grade of at least “c”?

Find the measure for the angle indicated in bold