At which value in the domain does f(x)=0?
x=-3
x=0
x=1
x-4

Can someone check if i did this correct. it’s number 4 if you’re wondering.

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”?

Tan198=asin164=? how to solve this? ?