{"id":271703,"date":"2025-07-26T06:19:21","date_gmt":"2025-07-26T06:19:21","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=271703"},"modified":"2025-07-26T06:19:23","modified_gmt":"2025-07-26T06:19:23","slug":"a-scientist-uses-a-submarine-to-study-ocean-life","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/07\/26\/a-scientist-uses-a-submarine-to-study-ocean-life\/","title":{"rendered":"A scientist uses a submarine to study ocean life"},"content":{"rendered":"\n

A scientist uses a submarine to study ocean life.
She begins at sea level, which is an elevation of 0 feet.
She travels down 21.1 feet.
She then ascends 19.1 feet.
Next, she travels down a second time, 80.7 feet.
How many feet must she now ascend to get back to sca
level?<\/p>\n\n\n\n

The correct answer and explanation is:<\/mark><\/strong><\/p>\n\n\n\n

To determine how many feet the scientist must ascend to return to sea level, we can break the problem into stages and track her movement step by step:<\/p>\n\n\n\n

    \n
  1. Starting at Sea Level<\/strong>: The scientist begins at sea level, which is at 0 feet.<\/li>\n\n\n\n
  2. First Descent<\/strong>: She descends 21.1 feet. This means she is now 21.1 feet below sea level. We can express this as: 0\u221221.1=\u221221.1\u00a0feet0 – 21.1 = -21.1 \\text{ feet} So, her position after the first descent is at -21.1 feet.<\/li>\n\n\n\n
  3. First Ascent<\/strong>: She ascends 19.1 feet. Ascending means moving toward sea level, so we add 19.1 feet to her current position of -21.1 feet: \u221221.1+19.1=\u22122.0\u00a0feet-21.1 + 19.1 = -2.0 \\text{ feet} After the first ascent, she is now 2 feet below sea level.<\/li>\n\n\n\n
  4. Second Descent<\/strong>: She descends again, this time by 80.7 feet. To find her new position, we subtract 80.7 feet from -2.0 feet: \u22122.0\u221280.7=\u221282.7\u00a0feet-2.0 – 80.7 = -82.7 \\text{ feet} After the second descent, she is now 82.7 feet below sea level.<\/li>\n\n\n\n
  5. Final Ascent<\/strong>: To return to sea level, she must ascend from -82.7 feet back to 0 feet. The total distance she needs to ascend is the absolute value of her current depth, which is: 82.7\u00a0feet82.7 \\text{ feet}<\/li>\n<\/ol>\n\n\n\n

    Therefore, the scientist must ascend 82.7 feet<\/strong> to return to sea level.<\/p>\n\n\n\n

    This problem involves basic arithmetic operations\u2014addition and subtraction\u2014where the key is to track the scientist\u2019s position relative to sea level after each movement. By starting from 0 feet and moving up or down in increments, we can calculate how much she must ascend to return to the starting point.<\/p>\n\n\n\n

      <\/ol>\n","protected":false},"excerpt":{"rendered":"

      A scientist uses a submarine to study ocean life.She begins at sea level, which is an elevation of 0 feet.She travels down 21.1 feet.She then ascends 19.1 feet.Next, she travels down a second time, 80.7 feet.How many feet must she now ascend to get back to scalevel? The correct answer and explanation is: To determine […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[25],"tags":[],"class_list":["post-271703","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/271703","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/comments?post=271703"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/271703\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=271703"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=271703"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=271703"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}