Answer:
A ≈ 494.80
V = 827.02
Step-by-step explanation:
height ( <em>h </em>) = 13 mm
radius ( <em>r </em>) = = 4.5 mm
Surface area =
= 2π(4.5)(13) + 2π(4.5)
≈ 494.80
Volume =
<em> </em>=
= 827.02
Given:
Karen earns $54.60 for working 6 hours.
Amount she earns varies directly with the number of hours she works.
She need to work to earn an additional $260.
To find:
Number of hours she need to work to earn an additional $260.
Solution:
Let the amount of earnings be A and number of hours be t.
According to question,
...(i)
where, k is constant of proportionality.
Karen earns $54.60 for working 6 hours.
Divide both sides by 6.
Put k=9.1 in (i).
Substitute A=260 in the above equation.
Divide both sides by 9.1.
Therefore, she need to work extra about 29 hours to earn an additional $260.