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3 years ago

If the volume of a cube is27cm2,find its total surface area

Mathematics

1 answer:

kumpel [21]3 years ago

4 0

Volume of a cube is s³

Total surface Area of a cube is 6s².

Therefore, given a volume of 27cm³

s³=27,

s=3√27

s=3cm.

Total surface Area

A=6s²

A=6×(3×3)

A=6×9

A=54cm².

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I really need help with this, my teacher doesn't really teach and I'm stumped again.

yarga [219]

Answer:

JMK = 54

JKH = 126

HLK = 90

HJL = 27

LHK = 63

JLK = 27

Step-by-step explanation:

Just use 180 for total angles in each triangle. Vertical angles mean the opposite to 126 is 126 and the other two that make up the inner vertices are (360- 126*2)/2 = 54

So, 126, `16, 54 , 54 are the inner angles in the circle. Just go from there.

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3 years ago

Question is below in picture.

Maurinko [17]

Answer:

C. $\sqrt{89}$ cm

Step-by-step explanation:

First, we can start out by stating that this is a right triangle, since it has a right angle, shown by the marker square in the corner of the triangle. The x part, is called the hypotenuse. When finding the value of the hypotenuse, we use a thing called the Pythagorean Theorem. This theorem is :

a^2 + b^2 = c^2

a is one side length, and b is the other. c is the hypotenuse. To find x, the hypotenuse, we simply plug in the values, and solve.

8^2 + 5^2 = c^2

64 + 25 = c^2

89 = c^2

To get c alone, we do the square root of 89.

$\sqrt{89}$ = c

9.43398113 = c

So, the answer is C. $\sqrt{89}$ cm

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2 years ago

Homework 9.4 Equations and Word Problems

lubasha [3.4K]

Answer:

idc

Step-by-step explanation:

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3 years ago

Abby bought an 8 pound bag of doog food for $7.40. How much does the bag cost per pound? (round to the nearest hundreth)

Sergio039 [100]

Answer:

Step-by-step explanation:

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3 years ago

Read 2 more answers

An urn contains 6 red and 7 black balls. 4 balls are randomly drawn from the urn in succession, with replacement. That is after

Nataly [62]

Answer:

0.538

Step-by-step explanation:

There are 13 balls in the urn

7 are black and 6 are red

There are 7 chances out of 13 to pick a black ball

7/13
7 ÷ 13 = 0.53846.....

Round and get:

0.538

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3 years ago