\begin{tabular}{l} 4. The following set of measurements (in cm) was recorded during \\ experiment: \\ 56,\( 8 ; 55,4 ; 78,9 ; 47,8 ; 34,2 ; 67,6 ; 45,5 ; 34,5 ; 64,5 \) \\ 88 \\ (a) Find the sum of the measurements and round it off to the nearest \\ whole number. \\ \( \begin{array}{l}\text { (ind }\end{array} \) \\ First round off each measurement to the nearest whole number and \\ en find the sum. \\ \hline\end{tabular}

1. List the original measurements: \(56.8,\; 55.4,\; 78.9,\; 47.8,\; 34.2,\; 67.6,\; 45.5,\; 34.5,\; 64.5,\; 88\). 2. Round each measurement to the nearest whole number: - \(56.8 \to 57\) - \(55.4 \to 55\) - \(78.9 \to 79\) - \(47.8 \to 48\) - \(34.2 \to 34\) - \(67.6 \to 68\) - \(45.5 \to 46\) - \(34.5 \to 35\) - \(64.5 \to 65\) - \(88\) is already a whole number. 3. The rounded measurements are: \(57,\; 55,\; 79,\; 48,\; 34,\; 68,\; 46,\; 35,\; 65,\; 88\). 4. Find the sum: \[ 57 + 55 + 79 + 48 + 34 + 68 + 46 + 35 + 65 + 88 \] Compute step-by-step: - \(57 + 55 = 112\) - \(112 + 79 = 191\) - \(191 + 48 = 239\) - \(239 + 34 = 273\) - \(273 + 68 = 341\) - \(341 + 46 = 387\) - \(387 + 35 = 422\) - \(422 + 65 = 487\) - \(487 + 88 = 575\) 5. The sum of the rounded measurements is \(575\).