Round-off 108.76 to the nearest tens. Write sqrt(60) correct to four significant figures. You may use a calculator or a square-roots table of values. Evaluate and write your answer correct to two significant figures: 72+43= Estimate the product: 23.8 x 349

1. Round-off 108.76 to the nearest tens. Step 1: Identify the tens digit. In the number 108.76, the tens digit is 0. Step 2: Look at the digit to the right of the tens digit. The digit to the right of 0 is 8 (in the ones place). Step 3: Round based on the digit to the right. Since 8 is 5 or greater, round up the tens digit. The 0 becomes 1. All digits to the right of the tens place (before the decimal) become 0, and digits after the decimal are dropped. 108.76 ≈ 110 The number rounded to the nearest tens is 110. 2. Write sqrt(60) correct to four significant figures. Step 1: Calculate the value of sqrt(60). Using a calculator, sqrt(60) ≈ 7.74596669... Step 2: Round the value to four significant figures. The first four significant figures are 7, 7, 4, 5. The fifth significant figure is 9, which is 5 or greater, so we round up the fourth significant figure (5). 7.7459... ≈ 7.746 sqrt(60) correct to four significant figures is 7.746. 3. Evaluate 7^2 + 4^3 and write your answer correct to two significant figures. Step 1: Calculate 7^2. 7^2 = 7 × 7 = 49 Step 2: Calculate 4^3. 4^3 = 4 × 4 × 4 = 16 × 4 = 64 Step 3: Add the results. 49 + 64 = 113 Step 4: Round the sum to two significant figures. The first two significant figures are 1 and 1. The third significant figure is 3, which is less than 5, so we keep the second significant figure as it is and replace the remaining digits before the decimal with zeros. 113 ≈ 110 The evaluated expression correct to two significant figures is 110. 4. Estimate the product: 23.8 × 349. Step 1: Round each number to a suitable value for estimation. Round 23.8 to the nearest ten: 23.8 ≈ 20. Round 349 to the nearest hundred: 349 ≈ 300. Step 2: Multiply the rounded numbers. 20 × 300 = 6000 The estimated product is 6000. What's next?