A professor at a local university noted that the grades of her students were normally distributed with a mean of 78 and a standard deviation of 10.

The professor has informed us that 23.89 percent of her students received grades of A. What is the minimum score needed to receive a grade of A?

(Please, use only one decimal Place)

step-by-step explanation:

could u provide us some answer choices or hmm idk maybe a table for us to anser with ? ?

hello there!

i believe the answer is

(cot2+1)/sec2=cot2

    csc2/sec2=cot2

  (1/sin2)/(1/cos2)=cot2

  (1/sin2)(cos2/1)=cot2

  cos2/sin2=cot2

  (1/tan2)=cot2

  (cot2)=(cot2)

hope this !

hyperz ^_^

a king of hearts and a 2 of spades