What is the value of the number 3 in the this this number 6035?

The mean of a set of data is -3.82 and its standard deviation is 2.31. find the z score for a value of 3.99.

Offering 30 if a plus b plus c equals 68 and ab plus bc plus ca equals 1121, where a, b, and c are all prime numbers, find the value of abc. the answer is 1978 but i need an explanation on how to get that.

If tan2a=cot(a+60), find the value of a, where 2a is an acute angle