Work out the volume of this hemisphere?

Factorize: x^2+8x+10 i just solved it but i don't know if the process is correct

Identify an equation in point slope form for the line perpendicular to y=3x+5 that passes through (4,-1)

An apartment has a replacement cost of $950,000 and contents valued at $1,450,000. it has a classification of a and a territory rating of 3. find the annual premium a) $10,185 b) $9,230 c) $3,155 d) $13,830