1 2 3 4 5 6 Indices my dear Watson.

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Presentation transcript:

1 2 3 4 5 6 Indices my dear Watson

A cube is of length 35. What is its volume? Question 1 A cube is of length 35. What is its volume? V = (35)3 = 315 ? Go Back >

Question 2 4x + 4x + 4x + 4x = 415. What is x? x = 14 ? Go Back > 4x + 4x + 4x + 4x = 4∙4x = 41∙4x = 4x+1. So if 4x+1 = 415, then x+1 = 15. Go Back >

Question 3 What is a third of 310? 39 ? Go Back >

Question 4 What is the square root of 38? 34 ? Go Back >

x = ½ Question 5 8x = 2x+1. What is x? ? 8x = (23)x = 23x = 2x+1. So 3x = x + 1. So 2x = 1, so x = ½. Go Back >

Question 6 Answer: 62a+1 ? Go Back > The side of a cube is 6a. Give an expression (as simplified as possible) for the surface area of that cube. ? Answer: 62a+1 The area of one side is (6a)2 = 62a. But there’s 6 sides of a cube, so the surface area is 6 x 62a = 61 x 62a = 62a+1. Go Back >