There are about 31{,}500{,}00031,500,00031, comma, 500, comma, 000 seconds in a year.
Choose the best approximation of the number of seconds in a year.

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.

Which shows one way to determine the facts of x3+4x2+5x+20 by grouping

Jonathas wants to get a cell phone. the phone costs $59 and the plan costs $39 per month.