A scientist uses a submarine to study ocean life.
A She begins at sea level, which is an elevation of o feet.
B She travels down 21.1 feet.
C She then ascends 19.1 feet.
D Next, she travels down a second time, 80.7 feet.
How many feet must she now ascend to get back to sea 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 down her movements step by step.<\/p>\n\n\n\n Thus, the correct answer is that the scientist must ascend 82.7 feet<\/strong> to return to sea level.<\/p>\n","protected":false},"excerpt":{"rendered":" A scientist uses a submarine to study ocean life.A She begins at sea level, which is an elevation of o feet.B She travels down 21.1 feet.C She then ascends 19.1 feet.D Next, she travels down a second time, 80.7 feet.How many feet must she now ascend to get back to sea level? The correct answer […]<\/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-273108","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/273108","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=273108"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/273108\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=273108"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=273108"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=273108"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}\n
The scientist begins at sea level, which is an elevation of 0 feet.<\/li>\n\n\n\n
When the scientist travels down 21.1 feet, her new elevation is: 0\u221221.1=\u221221.1\u00a0feet0 – 21.1 = -21.1 \\text{ feet} So, she is now 21.1 feet below sea level.<\/li>\n\n\n\n
When the scientist ascends 19.1 feet, her new elevation is: \u221221.1+19.1=\u22122.0\u00a0feet-21.1 + 19.1 = -2.0 \\text{ feet} This means she is now 2 feet below sea level.<\/li>\n\n\n\n
The scientist then travels down another 80.7 feet, so her new elevation is: \u22122.0\u221280.7=\u221282.7\u00a0feet-2.0 – 80.7 = -82.7 \\text{ feet} This puts her 82.7 feet below sea level.<\/li>\n\n\n\n
To get back to sea level (0 feet), she must ascend by the same amount that she is below sea level. Since she is at an elevation of -82.7 feet, she must ascend 82.7 feet<\/strong> to reach sea level.<\/li>\n<\/ol>\n\n\n\n