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3 years ago

Are there fewer squares or triangles? pic have 5 squares and 3 triangles

Mathematics

2 answers:

xz_007 [3.2K]3 years ago

8 0

Fewer triangles. There are 5 squares and 3 triangles with 3 being less then 5 there are less triangles.

NARA [144]3 years ago

7 0

3 is less than 5 There for 3 is less so there is less triangles

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Feliz [49]

Answer:

Therefore the mass of the of the oil is 409.59 kg.

Step-by-step explanation:

Let us consider a circular disk. The inner radius of the disk be r and the outer diameter of the disk be (r+Δr).

The area of the disk

=The area of the outer circle - The area of the inner circle

= $\pi (r+\triangle r)^2- \pi r^2$

$=\pi [r^2+2r\triangle r+(\triangle r)^2-r^2]$

$=\pi [2r\triangle r+(\triangle r)^2]$

Since (Δr)² is very small, So it is ignorable.

∴ $A=2\pi r\triangle r$

The density $\delta (r)= \frac{40}{1+r^2}$

We know,

Mass= Area× density

$=(2r \pi \triangle r)(\frac{40}{1+r^2}})$

Total mass $M=\sum_{i=1}^n \frac{80r_i\pi }{1+r^2}\triangle r_i$

Therefore

$\sum_{i=1}^n \frac{80r_i\pi }{1+r^2}\triangle r_i=\int_0^5 \frac{80r\pi }{1+r^2}dr$

$=40\pi[ln(1+r^2)]_0^5$

$=40\pi [ln(1+5^2)-ln(1+0^2)]$

$=40\pi ln(26)$

= 409.59 kg (approx)

Therefore the mass of the of the oil is 409.59 kg.

3 0

2 years ago

I will mark as brainiest for correct answer! Please help me! Thank you

Dmitrij [34]

For the division part:
$\frac{5-4}{4-3 }= \frac{1}{1 }=1$

But I think your question differs than this..

Am I right?

as your options do not include 1

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Simplify the following expressions by combining like terms. 11x + 7 + -3x - 3

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Hello,

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stiks02 [169]

Answer:

Solution set {x|x<8}

Step-by-step explanation:

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0.35x+0.9x<5.2+4.8

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x<10/1.25

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3 years ago

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