Find the length of r = 6 sec(0) from 0 = 0 to 0 = 3 a) 09/3 b) O 12/3 c) O 6/3 d) O 18/3 e) O 4/3

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7. Express the length of (a+b) in terms of 0. 6 FT a -9 F (a+b)=

1) Two metal strips are measured as 6.21cm and 1.529cm, correct to two and three decimal places respectively. Estimate their combined length when the strips are laid end to end. 2) A right-angled triangle has shorter side lengths exactly y^2 - x^2 and 2xy units respectively, where x and y are positive real numbers such that y is greater than x. Find an exact expression for the length of the hypotenuse (in appropriate units). 3) Solve for x given that x= a/b = b/(a/4) 4)Use interval notation to find an expression for the solution set of the following inequality:    (x+2)(x-3)<0. 5)Which one of the following equations describes the circle in the xy-plane with centre P(-2,2) and radius 3 units?