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Find the value of y, rounded to the nearest tenth. Please help me, I'd appreciate it!!

Find the value of y, rounded to the nearest tenth. Please help me, I'd appreciate-example-1

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If a secant and a tangent of a circle are drawn from a point outside the circle, then the product of the lengths of the secant and its external segment equals the square of the length of the tangent segment.

y
² = 7(15+7)
y² = 7*22
y² = 154
y = √154
y = 12.4 ← to the nearest tenth

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