College

1) Express 1.732 in the form of [tex]\frac{p}{q}[/tex], where [tex]q \neq 0[/tex].

2) The circumference of a circle is 176 cm. Find the area of the semicircle.

Answer :

Let's solve the problem step by step.

1) Express 1.732 in the form of [tex]\(\frac{p}{q}\)[/tex]

A decimal like 1.732 can be converted into a fraction. Initially, you can write it as [tex]\(\frac{1732}{1000}\)[/tex] because 1.732 means 1732 over 1000. Simplifying this fraction gives [tex]\(\frac{433}{250}\)[/tex]. So, the fraction form is [tex]\(\frac{433}{250}\)[/tex].

2) Find the area of a semicircle given the circumference is 176 cm

The formula for the circumference of a full circle is [tex]\(2 \pi r\)[/tex], where [tex]\(r\)[/tex] is the radius of the circle. Given the circumference is 176 cm, you can calculate the radius as follows:

[tex]\( r = \frac{176}{2\pi} \)[/tex]

Once you have the radius, the area of a full circle is given by [tex]\(\pi r^2\)[/tex]. Since we are looking for the area of a semicircle (half of a full circle), the formula becomes:

[tex]\(\text{Area of semicircle} = \frac{1}{2} \pi r^2\)[/tex]

Plug in the radius value:

[tex]\(\text{Area of semicircle} ≈ 1232.4959 \, \text{cm}^2\)[/tex]

Therefore, the area of the semicircle is approximately 1232.50 cm².