I just wanted to let the people no that this boy name Keyonnn keeps deleting every answer I give people and every question I post he probally gone delete this one to but anyways I just wanted to let yall no and what should I do about it.

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”?

Which of the following represents the factorization of the trinomial below? x^2+7x-30

What is the scale factor of two similar pyramids with volumes of 64 cubic feet and 8 cubic feet