Question

Question 3 math help please show work

Answer 1

`17.3\:\mathrm{m}`

Explanation:

The circumference of a circle is given by
`C=2r\pi`, where
`r` is the radius of the circle.

By definition, the radius is equal to half the diameter. Therefore, a circle with a diameter of 5.5 meters has a radius of
`5.5\cdot (1)/(2)=2.75` meters.

Thus, the circumference of the silo must be:

`C=2\cdot 2.75\cdot \pi=17.2787595947\approx \boxed{17.3\:\mathrm{m}}`(rounded to one decimal place as requested by question).

*Units for circumference should be in the same units as the radius/diameter is given in, since the circumference just refers to the perimeter of a circle.

**Your work for question 2 should include an equals sign, not an addition sign, between the part where you're adding the sevens and multiplying them:
`\implies 7+7+7+7+7+7\boxed{=}7\cdot 6`