Answer:
https://www.khanacademy.org/math/6th-grade-foundations-engageny/6th-m4-engage-ny-foundations/6th-m4-tb-foundations/v/multiplying-a-decimal-by-a-power-of-10
Step-by-step explanation:
does this help
Let x represent the length of the shortest side. Then the perimeter is
.. x +2x +(x +13) = 149
.. 4x = 136
.. x = 34
2x = 68
x+13 = 47
The lengths of the sides are 34, 47, and 68 ft.
Let C represent the total cost, and H represent the number of hours...
C = $25 + $8.50(H)
So for this problem...
C = $25 + $8.50x4
C = $25 + $34
C = $59
