Which of the following is not a prime number? 1057 157 3163 263

Hello there,

Let's remember that a prime number is greater than 1 that has no positive divisors other than 1 and itself.

We want to do the opposite of this ^.
 
1057 is your answer.

Hope this helps.

~Jurgen

The distance from point a to point c across the coordinate plane is aproxamatly 8.94 rounded to the nearest hundredth. you use a^2 + b^2 =c^2