{"id":"act_practice_pdf:pt1:math:018","source_id":"act_practice_pdf","source_item_id":"pt1-math-018","external_id":null,"program":"ACT","section":"math","category_code":"PHM","category":"Preparing for Higher Math","subcategory_code":"N","subcategory":"Number & Quantity","form_id":"act_practice_pdf:pt1","passage_id":null,"position":18,"scored":true,"layout_warning":"Stacked notation (fractions, radicals, matrices) does not survive text extraction. The image above is the question as printed; the text below it is approximate.","stem":"Given i = √ −1 , what is √ 9 + √ −16 ?","stimulus":"","stimulus_html":"<figure><img src=\"/api/assets/cb2521476c9916b567a04ebdae7142262e828f956cd5d8269ae0950c145b610f\" alt=\"Question 18 as printed in the Preparing for the ACT — Practice Test 1 booklet\"><figcaption>As printed in the official booklet.</figcaption></figure>","stem_html":"<p>Given i = √ −1 , what is √ 9 + √ −16 ?</p>","rationale_html":null,"correct_answer":["J"],"equiv_key":null,"has_media":true,"has_mathml":false,"has_table":false,"section_label":"Mathematics","options":[{"label":"F","content_html":"<p>i _</p>","ord":0},{"label":"G","content_html":"<p>i √ 7</p>","ord":1},{"label":"H","content_html":"<p>3 − 4i</p>","ord":2},{"label":"J","content_html":"<p>3 + 4i</p>","ord":3}],"passage":null,"attribution":{"source_id":"act_practice_pdf","source_name":"Official ACT full-length practice tests (PDF)","rights_holder":"ACT Education Corp.","canonical_url":"https://www.act.org/content/act/en/products-and-services/the-act/test-preparation.html","retrieved_from":"https://www.act.org/content/act/en/products-and-services/the-act/test-preparation.html","attribution":"Full-length ACT practice tests © ACT Education Corp., published free at act.org. Questions are retired items from previous ACT administrations.","disclaimer":"Extracted from a print-layout PDF: equations, figures and charts do not survive as text. Use the original PDF for anything that renders poorly. ACT® is a registered trademark of ACT Education Corp., which is not affiliated with, does not sponsor, and does not endorse this project.","license":"ACT Education Corp. copyright. Published free for personal test preparation; not licensed for redistribution.","redistributable":false,"item_count":342},"equivalents":[]}