The temperature in toronto at noon during a winter day measured 4°c. the temperature started dropping 2° every hour. which inequality can be used to find the number of hours, x, after which the temperature will measure below -3°c?

a.4−2> −3

b.−3−2> 4

c.−3−2< 4

d4−2< −3

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”?