Except for 2 and 3 every prime number on a hundred chart is either one more or one less than a multiple of

What signals you that factoring by grouping is the best method to use when factoring a problem?

The cross-sectional areas of a right triangular prism and a right cylinder are congruent. the right triangular prism has a height of 6 units, and the right cylinder has a height of 6 units. which conclusion can be made from the given information? the volume of the triangular prism is half the volume of the cylinder. the volume of the triangular prism is twice the volume of the cylinder. the volume of the triangular prism is equal to the volume of the cylinder. the volume of the triangular prism is not equal to the volume of the cylinder.

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that answer)