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2 years ago

7

The cube of volume is 27000 cm cube.Then find its edge.

1 answer:

Natasha_Volkova [10]2 years ago

4 0

Answer:

30 cm

Step-by-step explanation:

the cubed root of 27000 is 30

check:

V = lwh

V = 30·30·30 = 27000

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Find the mean of 3,2,4,6,5,6,1,7,9,8,10

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Answer:

$5\frac{6}{11}$

Step-by-step explanation:

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2 years ago

How do I solve for the missing lengths?

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Answer:

Part 4) $ER=3\ units$

Part 5) $DF=9\sqrt{10}\ units$

Part 6) $DE=30\ units$

Step-by-step explanation:

Part 4) Find ER

we know that

In the right triangle ERF

Applying the Pythagorean Theorem

$EF^2=ER^2+RF^2$

substitute the given values

$(3\sqrt{10})^2=ER^2+9^2$

solve for ER

$ER^2=(3\sqrt{10})^2-9^2$

$ER^2=90-81\\ER^2=9\\ER=3\ units$

Part 5) Find DF

we know that

In the right triangle DRF

Applying the Pythagorean Theorem

$DF^2=DR^2+RF^2$

substitute the given values

$DF^2=27^2+9^2$

$DF^2=810\\DF=\sqrt{810}\ units$

simplify

$DF=9\sqrt{10}\ units$

Part 6) Find DE

we know that

$DE=DR+RE$ ----> by segment addition postulate

we have

$DR=27\ units\\RE=ER=3\ units$

substitute

$DE=27+3=30\ units$

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3 years ago