exam Maths Puzzle Numerical Ability

B4

Find the total surface area and volume of each solid object. Round to the three significant digit.

the object is a frustums of cone (frustums)

top radius:4.5'
height

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exam Other Question

Would anyone be kind enough to show the steps and solution to the following?

Simplify. Write answers WITHOUT negative exponents.
(p-5)^-9(p^6)^4
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(p^-8)^0(p^4)^-5 4/x+4= 5/x-1 I have to solve this equation(i.e. x=4 or 6)