// Numbas version: exam_results_page_options
{"name": "NC Math 3 Solve an exponential decay problem -- Depreciation", "extensions": [], "custom_part_types": [], "resources": [], "navigation": {"allowregen": true, "showfrontpage": false, "preventleave": false, "typeendtoleave": false}, "question_groups": [{"pickingStrategy": "all-ordered", "questions": [{"ungrouped_variables": ["A", "r", "rPercent", "dFactor", "tDepreciate", "valueNow"], "parts": [{"customMarkingAlgorithm": "", "displayAnswer": "Decay", "scripts": {}, "unitTests": [], "showFeedbackIcon": true, "prompt": "<p>Is the value of the truck exponential growth or decay?</p>", "answer": "decay", "showCorrectAnswer": true, "type": "patternmatch", "customName": "", "marks": 1, "extendBaseMarkingAlgorithm": true, "variableReplacementStrategy": "originalfirst", "useCustomName": false, "matchMode": "exact", "adaptiveMarkingPenalty": 0, "variableReplacements": []}, {"customMarkingAlgorithm": "", "scripts": {}, "unitTests": [], "gaps": [{"correctAnswerFraction": false, "showFractionHint": true, "type": "numberentry", "maxValue": "A", "correctAnswerStyle": "plain", "extendBaseMarkingAlgorithm": true, "useCustomName": false, "mustBeReduced": false, "adaptiveMarkingPenalty": 0, "customMarkingAlgorithm": "", "minValue": "A", "scripts": {}, "mustBeReducedPC": 0, "customName": "", "variableReplacements": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "marks": 1, "unitTests": [], "variableReplacementStrategy": "originalfirst", "notationStyles": ["plain", "en", "si-en"], "allowFractions": false}], "showFeedbackIcon": true, "prompt": "<p>What is the original value of the truck?</p>\n<p>$\\$$[[0]]</p>", "showCorrectAnswer": true, "type": "gapfill", "customName": "", "marks": 0, "extendBaseMarkingAlgorithm": true, "variableReplacementStrategy": "originalfirst", "useCustomName": false, "sortAnswers": false, "adaptiveMarkingPenalty": 0, "variableReplacements": []}, {"customMarkingAlgorithm": "", "displayAnswer": "{rPercent}%", "scripts": {}, "unitTests": [], "showFeedbackIcon": true, "prompt": "<p>What is the growth or decay rate as a percent?</p>", "answer": "{rPercent}%", "showCorrectAnswer": true, "type": "patternmatch", "customName": "", "marks": 1, "extendBaseMarkingAlgorithm": true, "variableReplacementStrategy": "originalfirst", "useCustomName": false, "matchMode": "exact", "adaptiveMarkingPenalty": 0, "variableReplacements": []}, {"customMarkingAlgorithm": "", "scripts": {}, "unitTests": [], "gaps": [{"correctAnswerFraction": false, "precisionPartialCredit": "50", "mustBeReduced": false, "notationStyles": ["plain", "en", "si-en"], "precisionType": "dp", "type": "numberentry", "maxValue": "valueNow", "correctAnswerStyle": "plain", "extendBaseMarkingAlgorithm": true, "useCustomName": false, "precision": "2", "adaptiveMarkingPenalty": 0, "showPrecisionHint": false, "customMarkingAlgorithm": "", "minValue": "valueNow", "scripts": {}, "mustBeReducedPC": 0, "precisionMessage": "Money always is expressed with two decimal places.", "variableReplacements": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "strictPrecision": true, "marks": 1, "unitTests": [], "variableReplacementStrategy": "originalfirst", "customName": "", "allowFractions": false}], "showFeedbackIcon": true, "prompt": "<p>What is the value of the truck $\\var{tDepreciate}$ years after it was built?</p>\n<p>$\\$$[[0]]</p>", "showCorrectAnswer": true, "type": "gapfill", "customName": "", "marks": 0, "extendBaseMarkingAlgorithm": true, "variableReplacementStrategy": "originalfirst", "useCustomName": false, "sortAnswers": false, "adaptiveMarkingPenalty": 0, "variableReplacements": []}], "functions": {}, "advice": "", "preamble": {"js": "", "css": ""}, "variablesTest": {"maxRuns": 100, "condition": ""}, "variables": {"tDepreciate": {"group": "Ungrouped variables", "definition": "random(2..6)", "name": "tDepreciate", "description": "", "templateType": "anything"}, "dFactor": {"group": "Ungrouped variables", "definition": "1-r", "name": "dFactor", "description": "", "templateType": "anything"}, "r": {"group": "Ungrouped variables", "definition": "random(0.1..0.25#0.01)", "name": "r", "description": "", "templateType": "anything"}, "rPercent": {"group": "Ungrouped variables", "definition": "100*r", "name": "rPercent", "description": "", "templateType": "anything"}, "valueNow": {"group": "Ungrouped variables", "definition": "precround(A*(dFactor)^tDepreciate,2)", "name": "valueNow", "description": "", "templateType": "anything"}, "A": {"group": "Ungrouped variables", "definition": "random(40000..80000)", "name": "A", "description": "", "templateType": "anything"}}, "tags": [], "statement": "<p>The value, $y$, of a truck can be modeled by $ y = \\var{A}(\\var{dFactor})^t $, where $t$ is the number of years since the truck was built.</p>", "name": "NC Math 3 Solve an exponential decay problem -- Depreciation", "rulesets": {}, "extensions": [], "variable_groups": [], "metadata": {"licence": "All rights reserved", "description": ""}, "contributors": [{"name": "Terry Young", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/3130/"}]}]}], "contributors": [{"name": "Terry Young", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/3130/"}]}