What is the value of the expression below? 900 – 2 x (18x3)

Help it’s for a test and I need it done in under 20 mins

Three cylinders have a volume of 2836 cm^3. cylinder a has a height of 900 cm. cylinder b has a height of 225 cm. cylinder c has a height of 100 cm. find the radius of each cylinder. use 3.14 as an approximate for π

Which of the choices shown could be used to prove that aacp=abcp ?

2.5 milligrams is equivalent to how many grams