Plz
tanya is training a turtle for a turtle race. for every 2/3 of an hour that the turtle is crawling, he can travel 1/20 of a mile. at what unit rate is the turtle crawling?

a) 3/40 of a mile per hour

b) 1/30 of a mile per hour

c) 30 miles per hour

d) 43/60 of a mile per hour

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”?