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Alinara [238K]
2 years ago
8

Math Review 7th Grade. 2 Parts

Mathematics
2 answers:
miv72 [106K]2 years ago
8 0
Here is the answer Ik 7th grade can be hard sometimes

Lisa [10]2 years ago
6 0

Answer:use a cac

Step-by-step explanation:i would do that but I’m verry busy so I would use a cac

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What is 3/4 times 2/4
Sonja [21]

Answer:

6/16, which can be reduced to 3/8

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3 years ago
I am really confused with this question.
klemol [59]
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Find
Sedaia [141]

Answer:

The amount of steel used = 94.38 m^{2}

Step-by-step explanation:

Height of the tank = 4.5 m.

Diameter of the tank = 4.2 m.

But,

radius = \frac{diameter}{2}

           = \frac{4.2}{2}

radius  = 2.1 m

Total surface area of a cylinder = 2\pirh + 2\pir^{2}

                                      = 2\pir(r + h)

                                      = 2 x \frac{22}{7} x 2.1 (2.1 + 4.5)

                                      = 44 x 0.3 (6.6)

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Since \frac{1}{12} of the steel was wasted, then;

\frac{1}{12} x 87.12 = 7.26 m^{2}

Actual area of steel sheet used = 87.12 + 7.26

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Thus, 94.38 m^{2} of steel was used in making the tank.

4 0
3 years ago
a plastering contractor charges $18 per square yard( that is $2 per square foot). what is the cost of plastering 100 feet of wal
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Nat2105 [25]

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3 years ago
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