I will give. help please 74.94×103= __ because the number 10³ has 3 zeros when it is written without an exponent.

Really need on these. i have no idea what to do

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”?

38 points and brainliest plz answer question in word document