Final answer:
The diameter of a circle with a radius of 2.3 ft is 4.6 ft, calculated by multiplying the radius by 2. The result aligns with the significant figures in the given radius.
Step-by-step explanation:
To calculate the diameter of a circle given the radius (r = 2.3 ft), simply multiply the radius by 2. The diameter (D) is twice the length of the radius as per the formula:
D = 2r
Therefore, if r = 2.3 ft, then:
D = 2 × 2.3 ft
D = 4.6 ft
The diameter of the circle is 4.6 feet. In problems of this nature, it is important to consider the significant figures in the result. Since the radius is given to two significant figures, the diameter should also be reported to two significant figures as D=4.6 ft.