Question 1 (15 marks) (a) A rectangle has perimeter 20 m. Express the area of the rectangle as a function of the length of one of its sides. State the domain of the function. [5 marks] 5h (b) If f(x) = 5ª, show that f(x+h)-f(x) h 5- (5^ /-=-1¹). 5x [5 marks] h (c) Given that e−0.01t [5 marks] = 1000. Solve for t. =