// Numbas version: finer_feedback_settings
{"name": "Exponenti\u00eble daling Instagram", "extensions": [], "custom_part_types": [], "resources": [], "navigation": {"allowregen": true, "showfrontpage": false, "preventleave": false, "typeendtoleave": false}, "question_groups": [{"pickingStrategy": "all-ordered", "questions": [{"name": "Exponenti\u00eble daling Instagram", "tags": [], "metadata": {"description": "<p>Voorschrift dalende exponenti&euml;le functie.</p>", "licence": "Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International"}, "statement": "<p>Het aantal mensen dat zich een reclame op Instagram herinnert, neemt exponentieel af in de loop van de tijd.</p>\n<p>Je ziet in de tabel het aantal mensen (in %) dat zich de rickame herinnert $t$ dagen na bekijken.</p>\n<table border=\"1\">\n<tbody>\n<tr>\n<td>$t$</td>\n<td>1</td>\n<td>3</td>\n</tr>\n<tr>\n<td>$N(t)$</td>\n<td>{percentage1} %</td>\n<td>{formatnumber(percentage3,\"plain-eu\")} %</td>\n</tr>\n</tbody>\n</table>", "advice": "", "rulesets": {}, "extensions": [], "builtin_constants": {"e": true, "pi,\u03c0": true, "i": true}, "constants": [], "variables": {"percentage1": {"name": "percentage1", "group": "Ungrouped variables", "definition": "100 - afname", "description": "", "templateType": "anything", "can_override": false}, "percentage3": {"name": "percentage3", "group": "Ungrouped variables", "definition": "dec(100*(1-afname/100)^3)", "description": "", "templateType": "anything", "can_override": false}, "afname": {"name": "afname", "group": "Ungrouped variables", "definition": "random(11 .. 19#1)", "description": "", "templateType": "randrange", "can_override": false}, "factor": {"name": "factor", "group": "Ungrouped variables", "definition": "dec(1-afname/100)", "description": "", "templateType": "anything", "can_override": false}, "factor2": {"name": "factor2", "group": "Ungrouped variables", "definition": "dec((1-afname/100)^2)", "description": "", "templateType": "anything", "can_override": false}}, "variablesTest": {"condition": "", "maxRuns": 100}, "ungrouped_variables": ["percentage1", "percentage3", "afname", "factor", "factor2"], "variable_groups": [], "functions": {}, "preamble": {"js": "", "css": ""}, "parts": [{"type": "1_n_2", "useCustomName": false, "customName": "", "marks": 0, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "prompt": "<p>Wat is het voorschrift $N(t)$ van de functie die het aantal mensen $N$ (in %) uitdrukt in functie van de tijd $t$ in dagen, met $t=0$ de dag van bekijken?</p>", "minMarks": 0, "maxMarks": 0, "shuffleChoices": true, "displayType": "radiogroup", "displayColumns": 0, "showCellAnswerState": true, "choices": ["$N(t) = 100 \\cdot \\var{formatnumber(factor2,\"plain-eu\")}^t$", "$N(t) = 100 \\cdot \\var{formatnumber(factor,\"plain-eu\")}^t$", "$N(t) = \\var{percentage1} \\cdot \\var{formatnumber(factor2,\"plain-eu\")}^t$", "$N(t) = \\var{percentage1} \\cdot \\var{formatnumber(factor,\"plain-eu\")}^t$"], "matrix": [0, "1", 0, 0], "distractors": ["", "", "", ""]}], "partsMode": "all", "maxMarks": 0, "objectives": [], "penalties": [], "objectiveVisibility": "always", "penaltyVisibility": "always", "type": "question", "contributors": [{"name": "Hans Denayer", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/18121/"}]}]}], "contributors": [{"name": "Hans Denayer", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/18121/"}]}