The fractions of 4/6 & 5/10

What effect would doubling all the dimensions of a triangular pyramid have on the volume of the pyramid? explain your reasoning.

5, 6, 10 question: a. determine whether the side lengths form a triangle. (explain your reasoning) b. if it is a triangle, determine whether it is a right, acute, or obtuse triangle. (show your work)

87.5% , 100% , 83.33 , 93.33% , 100% , 82.5% are all the academic points i've gotten this quarter. what's my final grade?