Final answer:
Konrad, Marek, and Ming collectively spent between $135 and $165 at the mall, with each person spending between $45 and $55.
Step-by-step explanation:
Konrad, Marek, and Ming each spent an amount between $45 and $55. The total expenditure for the three individuals is within the range of $135 to $165.
The calculation is based on the given information that each person spent between $45 and $55. To find the total expenditure range, we multiply the individual spending range by the number of people:
![\[ \text{Total expenditure} = \text{Number of people} * \text{Individual spending range} \]](https://img.qammunity.org/2024/formulas/mathematics/high-school/mzaz9yios5x2ia0kw52pzermxp1y5wyizp.png)
![\[ \text{Total expenditure} = 3 * (45 + 55) \]](https://img.qammunity.org/2024/formulas/mathematics/high-school/q6iglrxlb0q6oil5bwtza4m81w9v7fgfnz.png)
![\[ \text{Total expenditure} = 3 * 100 \]](https://img.qammunity.org/2024/formulas/mathematics/high-school/mqobpfm7r7ff316yg5j7r0e6m68aq702et.png)
![\[ \text{Total expenditure} = 300 \]](https://img.qammunity.org/2024/formulas/mathematics/high-school/5h4ipn0hdiiyof8emgqlkg76di6q3g79dt.png)
Therefore, Konrad, Marek, and Ming spent a total of $300 collectively, within the specified range of $135 to $165.