• anonymous
1.) A balloon has a circumference of 16 cm. Use the circumference to approximate the surface area of the balloon to the nearest square. My answer: 81cm^2. Is that correct? 2.) Find the volume of the sphere shown. Give each answer rounded to the nearest cubic unit. http://assets.openstudy.com/updates/attachments/510322e2e4b03186c3f90942-khart-1359160103056-problem7.jpg my answer: 4,189 mm^3. Is that correct? 3.) Determine whether the two figures are similar. If so, give the similarity ratio of the smaller figure to the larger figure.
Mathematics

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