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2 years ago

13

A colony of ants carried away 6 of your muffins. That was 2/7 of all of them! How many are left?

2 answers:

skad [1K]2 years ago

6 0

15 would be left, because: Half of 6 is 3, 3 is equal to 1/7. So if you multiply 3 times 7 you get 21. You would then subtract 6 from 21, which leaves you with 15.

notka56 [123]2 years ago

4 0

If 2/7=6 then 1/7=3
So 3×7=21 I think

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Find a formula for the described function. An open rectangular box with volume 3 m3 has a square base. Express the surface area

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Answer:

$SA(x) = x^2 + \frac{12}{x}$

Step-by-step explanation:

Given

$V = 3m^3$ --- volume

$x \to base\ length$

$y \to height$

Required

The surface area as a function of base length

The volume (V) is calculated as:

$V = Base\ Area * Height$

$V = x*x*y$

$V = x^2*y$

Make y the subject

$y = \frac{V}{x^2}$

Substitute 3 for V

$y = \frac{3}{x^2}$

The surface area of the open box is:

$SA = x^2 + 2xy+2xy$

$SA = x^2 + 4xy$

Substitute: $y = \frac{3}{x^2}$

$SA = x^2 + 4x*\frac{3}{x^2}$

$SA = x^2 + 4*\frac{3}{x}$

$SA = x^2 + \frac{12}{x}$

Hence, the function is:

$SA(x) = x^2 + \frac{12}{x}$

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