Khaemenes Academy · Open-Age Mathematics

Unit 03 Extended Practice

Generalization, model comparison, proof, and technology-assisted validation.

Directions: Show exact work before decimals, label domains or intervals, and explain calculator use.

1. {'id': 'u03-l06', 'number': 6, 'title': 'Logarithmic Scales and Data Interpretation', 'family': 'logarithmic', 'week': 9, 'unit': 3, 'unit_title': 'Exponential & Logarithmic Functions', 'essential': 'How do multiplicative change, inverse structure, logarithmic scales, and parameter interpretation support defensible growth and decay models?', 'project': 'Growth, Decay & Scale Modelling Report'}

Rewrite log₂32=5 in exponential form.

2. {'id': 'u03-l06', 'number': 6, 'title': 'Logarithmic Scales and Data Interpretation', 'family': 'logarithmic', 'week': 9, 'unit': 3, 'unit_title': 'Exponential & Logarithmic Functions', 'essential': 'How do multiplicative change, inverse structure, logarithmic scales, and parameter interpretation support defensible growth and decay models?', 'project': 'Growth, Decay & Scale Modelling Report'}

Evaluate log₁₀0.001.

3. {'id': 'u03-l06', 'number': 6, 'title': 'Logarithmic Scales and Data Interpretation', 'family': 'logarithmic', 'week': 9, 'unit': 3, 'unit_title': 'Exponential & Logarithmic Functions', 'essential': 'How do multiplicative change, inverse structure, logarithmic scales, and parameter interpretation support defensible growth and decay models?', 'project': 'Growth, Decay & Scale Modelling Report'}

Expand ln(3x²).

4. {'id': 'u03-l06', 'number': 6, 'title': 'Logarithmic Scales and Data Interpretation', 'family': 'logarithmic', 'week': 9, 'unit': 3, 'unit_title': 'Exponential & Logarithmic Functions', 'essential': 'How do multiplicative change, inverse structure, logarithmic scales, and parameter interpretation support defensible growth and decay models?', 'project': 'Growth, Decay & Scale Modelling Report'}

Condense 2lnx−ln(x+1).

5. {'id': 'u03-l06', 'number': 6, 'title': 'Logarithmic Scales and Data Interpretation', 'family': 'logarithmic', 'week': 9, 'unit': 3, 'unit_title': 'Exponential & Logarithmic Functions', 'essential': 'How do multiplicative change, inverse structure, logarithmic scales, and parameter interpretation support defensible growth and decay models?', 'project': 'Growth, Decay & Scale Modelling Report'}

Solve log₃(x−1)=2.

6. {'id': 'u03-l06', 'number': 6, 'title': 'Logarithmic Scales and Data Interpretation', 'family': 'logarithmic', 'week': 9, 'unit': 3, 'unit_title': 'Exponential & Logarithmic Functions', 'essential': 'How do multiplicative change, inverse structure, logarithmic scales, and parameter interpretation support defensible growth and decay models?', 'project': 'Growth, Decay & Scale Modelling Report'}

Use change of base to express log₇20.

7. {'id': 'u03-l07', 'number': 7, 'title': 'Exponential Regression and Model Validation', 'family': 'exponential', 'week': 9, 'unit': 3, 'unit_title': 'Exponential & Logarithmic Functions', 'essential': 'How do multiplicative change, inverse structure, logarithmic scales, and parameter interpretation support defensible growth and decay models?', 'project': 'Growth, Decay & Scale Modelling Report'}

A quantity begins at 500 and grows 4% yearly. Write the model.

8. {'id': 'u03-l07', 'number': 7, 'title': 'Exponential Regression and Model Validation', 'family': 'exponential', 'week': 9, 'unit': 3, 'unit_title': 'Exponential & Logarithmic Functions', 'essential': 'How do multiplicative change, inverse structure, logarithmic scales, and parameter interpretation support defensible growth and decay models?', 'project': 'Growth, Decay & Scale Modelling Report'}

Evaluate 200(0.8)^3.

9. {'id': 'u03-l07', 'number': 7, 'title': 'Exponential Regression and Model Validation', 'family': 'exponential', 'week': 9, 'unit': 3, 'unit_title': 'Exponential & Logarithmic Functions', 'essential': 'How do multiplicative change, inverse structure, logarithmic scales, and parameter interpretation support defensible growth and decay models?', 'project': 'Growth, Decay & Scale Modelling Report'}

A population doubles every 6 years. Give a base-2 model.

10. {'id': 'u03-l07', 'number': 7, 'title': 'Exponential Regression and Model Validation', 'family': 'exponential', 'week': 9, 'unit': 3, 'unit_title': 'Exponential & Logarithmic Functions', 'essential': 'How do multiplicative change, inverse structure, logarithmic scales, and parameter interpretation support defensible growth and decay models?', 'project': 'Growth, Decay & Scale Modelling Report'}

Solve 3^x=81.

11. {'id': 'u03-l07', 'number': 7, 'title': 'Exponential Regression and Model Validation', 'family': 'exponential', 'week': 9, 'unit': 3, 'unit_title': 'Exponential & Logarithmic Functions', 'essential': 'How do multiplicative change, inverse structure, logarithmic scales, and parameter interpretation support defensible growth and decay models?', 'project': 'Growth, Decay & Scale Modelling Report'}

Find the continuous growth rate k if A=A₀e^{0.07t}.

12. {'id': 'u03-l07', 'number': 7, 'title': 'Exponential Regression and Model Validation', 'family': 'exponential', 'week': 9, 'unit': 3, 'unit_title': 'Exponential & Logarithmic Functions', 'essential': 'How do multiplicative change, inverse structure, logarithmic scales, and parameter interpretation support defensible growth and decay models?', 'project': 'Growth, Decay & Scale Modelling Report'}

Find the half-life for A=A₀e^{-0.2t}.

β Beta Program