PLZZZ HELP ME FORGODSAKE HELP ME PLZ [In this question, take
=3.14]

a) A hollow cylinder standing on a horizontal circular base of radius 10 cm
contains water to a depth of 12 cm.

Find the volume of the water.=

b) A solid sphere has radius of 5 cm. Find the volume of the sphere =

c) If the sphere is placed in the cylinder of water, find the increase in the depth of the water=

Factor the expression using gcf 9b+45

Each person in an it department of 25 people works on at least one of 3 major projects: system security, program implementation, platform development. 10 people work on system security, 13 work on program implementation, and 12 work on platform development. 4 people work on system security and platform development, 5 people work on program implementation and platform development, and 2 people work on all three projects. how many people work on system security and program implementation?

Multiply and simplify. (x - 4) (x^2 – 5x – 6) i will mark brainliest if your answer is right. show how you got the answer. if your answer is correct but does not show how you got the answer you will not be marked brainliest.