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Leona [35]
3 years ago
11

A student skipped a step when she tried to convert 18 hours into seconds,

Mathematics
1 answer:
gladu [14]3 years ago
5 0

Answer:

The conversion of minutes to seconds is skipped in multiple-step conversion.

Step-by-step explanation:

Given:

To convert 18 hours into seconds.

Now, to get the conversion ratio skip in this multiple-step conversion.

First we need to convert hours into minutes:

1 hour = 60 minutes.

So, 18 hours = 18\times 60 minutes

                     = 1080 minutes.

Then, we convert minutes into seconds:

1 minute = 60 seconds.

So, 1080 minutes = 1080\times 60 seconds

                             =  64800 seconds.

Thus, 18 hours =  64800 seconds.

<u>As given in question the conversion from hours to seconds is there but the conversion of minutes to second is not there it is skipped so the result is incorrect.</u>

Therefore, the conversion of minutes to seconds is skipped in multiple-step conversion.

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Find the greatest common factor of 27<br> and 45<br> .
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Answer:

\large\boxed{GCF(27,\ 36)=9}

Step-by-step explanation:

\begin{array}{c|c}27&3\\9&3\\3&3\\1\end{array}\\\\27=\boxed3\cdot\boxed3\cdot3\\\\\begin{array}{c|c}45&3\\15&3\\5&5\\1\end{array}\\\\45=\boxed3\cdot\boxed3\cdot5\\\\GCF(27,\ 45)=\boxed3\cdot\boxed3=9

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4 years ago
  A store sells two kinds of​ candles, scented and unscented. The scented candles burn one eighth inch
sineoko [7]

Answer:

Scented candle, 1/2 inch per hour

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Step-by-step explanation:

The scented candle burns 1/8 inch in every 15 minutes. The unscented candle burns 1/9 inch in every 20 minutes.

We simply first convert the time taken in fraction to minutes for convenience using the conversion 60 minutes are in an hour.

Now let’s calculate unit rate per hour I.e every 60 minutes.

For the scented candle:

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x inch will burn in 60 minutes

To get x, we cross multiply.

1/8 * 60 = 15 * x

15x = 7.5, x = 7.5/15 = 1/2 = 0.5

This means that half of the scented candle will have been burnt in 1 hour.

Now, for the unscented candle, if 1/9 inch burns in 20 minutes, x inch will burn in 60 minutes.

1/9 * 60 = 20x

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x = 1/3 or 0.33

This means one-third will be burnt in an hour

The scented one burns more.

The unit rate is the rate of burning per hour. It is the fraction of the candles that will burn per hour. It enables us find the time it will take for either candles to burn up.

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Step-by-step explanation:

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