What is the approximate uncertainty in the area of a circle of radius 4.5×10^4 cm? express your answer using one significant figure.

Explanation:

It is given that,

Radius of the circle,

The area of the circle is given by :

or

As there is no uncertainty given in the radius of the circle. So, the area of the circle is . Hence, this is the required solution.

answer: the rock sample is a sedimentary rock.

explanation:

it is given that:

mass of rock sample, m = 2.7 g

volume of rock sample,

so, density of rock sample will be

since, the density of rock sample is . hence, the rock sample is a sedimentary rock, whose densities varies between .

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