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netineya [11]
3 years ago
12

The equation of a circle is x^2 + y^2= 42.25 Find the radius of the circle.

Mathematics
1 answer:
poizon [28]3 years ago
7 0

Answer:

radius = 6.5

Step-by-step explanation:

The equation of a circle centred at the origin is

x² + y² = r² ( where r is the radius )

x² + y² = 42.25 ← is in this form

with r² = 42.25 ( take the square root of both sides )

r = \sqrt{42.25} = 6.5

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2 years ago
A bucket that weighs 6 lb and a rope of negligible weight are used to draw water from a well that is 80 ft deep. The bucket is f
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Step-by-step explanation:

To answer this question, we need to find the force applied by the rope on the bucket at time t

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After t seconds, the weight of the bucket is 42-0.15 t \mathrm{lb}

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=\left[63 t-0.2 t^{2}\right]_{0}^{36}

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