3. Find the exact value of: (a) 18.7-3.4^2 (2 marks (b) (5.3+7.39)/(1.35) (2 marks (c) (3.45times 6.25)/(67.3-45.9) (2 marks

Let's solve each part of the question step by step:(a) To find the exact value, we need to calculate the square of 3.4 and then subtract it from 18.7. Now, subtract this value from 18.7: Therefore, the exact value of (a) is 7.14.(b) To find the exact value, we need to add 5.3 and 7.39, and then divide the sum by 1.35. Now, divide this sum by 1.35: Therefore, the exact value of (b) is 9.4.(c) To find the exact value, we need to multiply 3.45 by 6.25, and then divide the product by the difference between 67.3 and 45.9. Now, subtract 45.9 from 67.3: Finally, divide the product by this difference: Therefore, the exact value of (c) is approximately 1.005.