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Mathematics, 15.11.2019 09:31 Theacefamily123

Aparabolic listening device is shaped such that the depth of the bowl depends on its radius and can be represented by the curve d(r) = 0.145r2.
what is the radius when the depth is 8 inches? round to the nearest thousandth of an inch.
4.417 inches
5.252 inches
7.428 inches
20.505 inches

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