How would you expalain the reappearance of the opportunist herbs within the last 300 years of the sediment core?

Answermost of the time it would be ground into fine sediment,and sometimes they are carried away from the original location;

Some of the great contributes to advancement in the us were immigrants

Ithink the correct answer would be false. having volumes of two triangular prisms being the same does not mean that they are congruent. you can only say that shapes are congruent when you can slide, flip or turn one so that it would fit exactly to the other shape. the can be congruent when the side length and the measurement of the angles in the shapes are the same or equal. having equal volumes does not necessarily mean they have the same measurement of their angles and side lengths. they could have different slant heights and the areas of their bases.