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25 December, 07:15

Erica made a cylindrical pottery vase with a height of 45 cm and a diameter of 14 cm. Erica's friend Janine made a cylindrical vase in which the sum of the lateral area and area of one base was about 3000 square centimeters. The vase had a height of 50 centimeters. Find the radius of the vase to the nearest tenth.

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Answers (2)
  1. 25 December, 07:19
    0
    The answer is 8.8cm good luck
  2. 25 December, 07:33
    0
    The answer to your question is: 8.8 cm

    Step-by-step explanation:

    Data

    total area = 3000 cm²

    height = 50 cm

    radius = ?

    Formula

    Total area = lateral area + base area = 2πrh + πr²

    3000 = 2 (3.1416) (50) r + (3.1416) r²

    3000 = 314.16r + 3.1416r² = 3.1416r² + 314.16r - 3000 = 0

    Solve the equation with the quadratic formula

    r1 = 8.77 r 2 = - 108.78 (this answer is incorrect because is negative)
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