In planning maintenance for a city's infrastructure, a civil engineer estimates that, starting from the present, the population of the city will decrease by 10 percent every 20 years. If the present population of the city is 50,000, which of the following expressions represents the engineer's estimate of the population of the city t years from now?
","rationale_html":null,"correct_answer":["D"],"has_media":false,"has_mathml":false,"has_table":false,"source_created_at":null,"source_updated_at":null,"options":[{"label":"A","content_html":"50,000(0.1)^20 t
","ord":0},{"label":"B","content_html":"50,000(0.1)^t/20
","ord":1},{"label":"C","content_html":"50,000(0.9)^20 t
","ord":2},{"label":"D","content_html":"50,000(0.9)^t/20
","ord":3}],"attribution":{"source_id":"agieval_sat","source_name":"AGIEval SAT subsets (sat-math, sat-en)","rights_holder":"College Board (via the AGIEval benchmark)","canonical_url":"https://github.com/ruixiangcui/AGIEval","retrieved_from":"https://datasets-server.huggingface.co/rows","attribution":"Questions from the AGIEval benchmark's SAT subsets, derived from pre-2016 College Board SAT exams.","disclaimer":"These items follow the pre-2016 paper SAT format and do not reflect the current digital SAT. Useful as a benchmark set, not as current test preparation.","license":"Questions derived from pre-2016 College Board SAT exams and remain College Board copyright upstream. AGIEval is published for research.","redistributable":false,"item_count":425}}