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3 years ago

The question is............

Mathematics

1 answer:

irina1246 [14]3 years ago

7 0

A(n,s)=(ns^2)/(4tan(180/n)), n=number of sides, s=side length

A(8,4.6)=(8*4.6^2)/(4tan22.5)

A(8,4.6)=42.32/tan22.5 m (exact)

A(8, 4.6)≈102.17 m^2 (to nearest hundredth of a square meter)

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A chef made 30 donuts in 60 minutes. How long would it take him to<br> make 90 donuts?

Snowcat [4.5K]

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3 years ago

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Mason's favorite brand of peanut butter is available in two sizes. Each size and its price are shown in the table. Use the table

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1. What is the unit rate for each size of peanut butter?Regular: $16 per ounceFamily size: $40 per ounce
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The edge of a cube was found to be 30 cm with a possible error in measurement of 0.2 cm. Use differentials to estimate the maxim

rjkz [21]

Answer:

Maximum volume error = ±540 cm³

Relative error = 0.02

Percentage error = 2%

Step-by-step explanation:

Relative error : The ratio of volume error to the total volume.

Percentage error: The product of relative error and 100.

The volume of a cube is = $side^3$

v =x³

Differentiate with respect to x

$\frac{dv}{dx} = 3x^2$

$\Rightarrow dv = 3x^2 dx$

Here are x = 30 cm and dx= ±0.2 cm

∴ dv = 3×(30 cm)² (±0.2 cm)

=±540 cm³

The volume of the cube = 30³ cm ³ = 27,000 cm³

Then the relative error

$=\frac{dv}{v}$

$=\frac{540 cm^3}{27,000 cm^3}$

= 0.02.

The percentage error

= (0.02×100)

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7 0

3 years ago

7 times as much as the sum of 1/3 and 4/5

LenKa [72]

1.86 is your answer
1/3*4/5=4/15
4/14*7/1=28/15
28/15=1.86
Your answer is 1.86

Hope this helps.

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4 years ago

(2x^2+5x-7)+(3-4x^2+6x)

jarptica [38.1K]

-2x^2 + 11x - 4

To get this answer, you need to combine like terms. However, before this, remember that you are ADDING, so don’t accidentally subtract any numbers.

Then, just follow these steps:

2x^2 + (-4x^2) = -2x^2

5x + 6x = 11x

-7 + 3 = -4

And proceed to put them in the equation correctly.

Hope this helps!

6 0

3 years ago