I really need some help here! Find the volume of the solid where the cone and half sphere are hollow. Use 3.14 for pi.

I also need help with this one
finding the volume

yellow for this second question blue for the first question

whoever gets the right answer for either of these questions will be brainliested

395.84

step-by-step explanation:

2πrh+2πr²

2 (pie)(radius)(height)+2(pie)(radius)^2

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there is only one way to arrange all the eight relative to each other because they are not distinct. we have

now there are nine places to place an (and not more than one in one place).   because we have four symbols, we need to choose four of these nine places to insert an . order does not matter because the are not distinct.

thus there are 1 · c(9,4) ways, or, if we calculate it,

thus there are 126 ways to form such "words."