Calculate (\dfrac{165^2 + \sqrt{75.125} - 11.2 \times (-3)}{3.142}). Write your answer correct to 2 significant figures. The number of people in a shopping mall is 1100, correct to the nearest hundred. Write down the minimum number of people there are in the mall.

1. Evaluate the expression using correct order of operations

$\frac{165^2+\sqrt{75.125}-11.2\times(-3)}{3.142}=8678.315\ldots$

2. Round the calculator answer to 2 significant figures

$8678.315\ldots \approx 8700 \text{ correct to 2 significant figures}$

1. Find the lower bound for 1100 rounded to the nearest hundred

Since the number is $1100$ correct to the nearest hundred, the minimum value is halfway between $1000$ and $1100$:

$1100-50=1050$