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3 years ago

Equivalent fraction of 5/6

Mathematics

2 answers:

Slav-nsk [51]3 years ago

8 0

10/12!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Zarrin [17]3 years ago

7 0

The list is long, but here goes:

10/12, 15/18, 20/24, 25/30, 30/36, ... and so on.

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I need help please

Levart [38]

The correct answer is true:)

7 0

2 years ago

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A welder drops a piece of red-hot steel on the floor. The initial temperature of the steel is 2,500 degrees Fahrenheit. The ambi

sergey [27]

Answer: After 18.05 minutes, the temperature of steel becomes 100 degrees.

Step-by-step explanation:

Since we have given that

Initial temperature = 2500

At t = 0,

we get that

$f(t)=Ce^{-kt}+80\\\\2500=C+80\\\\2500-80=C\\\\2420=C$

After 2 minutes, the temperature of the steel is 1500 degrees.

so, it becomes,

$1500=2420e^{-2k}+80\\\\1500-80=2420e^{-2k}\\\\\dfrac{1420}{2420}=e^{-2k}\\\\0.587=e^{-2k}\\\\\ln 0.587=-2k\\\\-0.533=-2k\\\\k=\dfrac{0.533}{2}\\\\k=0.266$

So, We need to find the number of minutes when the temperature of steel would be 100 degrees.

So, it becomes,

$100=2420e^{-0.266t}+80\\\\100-80=2420e^{-0.266t}\\\\20=2420e^{-0.266t}\\\\\dfrac{20}{2420}=e^{-0.266t}\\\\\ln \dfrac{20}{2420}=-0.266t\\\\-4.8=-0.266t\\\\t=\dfrac{4.8}{0.266}\\\\t=18.05$

Hence, after 18.05 minutes, the temperature of steel becomes 100 degrees.

7 0

3 years ago

Help me please will mark brainliest

Ymorist [56]

Answer:

197in^2

Step-by-step explanation:

5x5=25(top face)

5x5=25(left face)

9x5=45(bottom face)

6.4x5=26(right face)

Front and behind face: trapezoid area (trapezoid formula h x (a+b)/2)

(5+9)/2 x 5=7x5=35

35+35+25+25+45+25=197in^2

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2 years ago

How many tens are in 39

Nadusha1986 [10]

Answer:

3 tens and 9 ones

Step-by-step explanation:

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2 years ago

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Three friends all have same ages that are consecutive integers. The sum of their ages is 57. What is the age of the oldest frien

quester [9]

Answer:

20 yrs old

Step-by-step explanation:

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3 years ago