anonymous
  • anonymous
Sol is building a planting bed in the shape of a trapezoid. The bed will be 9 in deep. The bases of the trapezoid are 2ft and 8 ft and the sides are both 5 ft long. How many cubic feet of topsoil is needed to fill the bed?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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amistre64
  • amistre64
area of a trap is (b+b)h/2 so times that by 9 after calculating for the height
amistre64
  • amistre64
and if course converting to inches.... or viceaversa
anonymous
  • anonymous
ha right on... I am trying to work it out now... and see ...

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anonymous
  • anonymous
base and base is 2 and 8 ?
anonymous
  • anonymous
and the height is the 9?
amistre64
  • amistre64
1 Attachment
amistre64
  • amistre64
one thing to remember is that a 3-4-5 triangle is a rt trianlge; and they love to use it....
amistre64
  • amistre64
5^2 = 3^2 + h^2 25 - 9 = h^2 16 = h^2 ; h=4
anonymous
  • anonymous
good grief
amistre64
  • amistre64
(2+8)4 ------ = area = 20 2
amistre64
  • amistre64
9 inches aint a foot; so convert it; 9/12 = 3/4 20(3/4) = 5(3) = 15 cubic feet
anonymous
  • anonymous
so 15 cubic feet of top soil is needed... ok.. let me finish my problem and check it to yours.... thank you again!
amistre64
  • amistre64
youre welcome :)
anonymous
  • anonymous
Alright... I get the same... but it would have been wrong... I didnt know to convert. Good beans~
amistre64
  • amistre64
you get a ruler .... :) 1 ft = 12 in 9in(1ft) ------ = (9/12) ft = (3/4)ft 12 in
anonymous
  • anonymous
I like how you show the work and where it all comes from... Very great on the clarification!!! :)
anonymous
  • anonymous
yeah it totally made sense

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