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3 years ago

Jada and Lin are comparing inches and feet. Jada says that the constant of proportionality is 12. Lin says it is 112.

Mathematics

1 answer:

Alecsey [184]3 years ago

8 0

Answer:

Jada and lin are comparing inches and feet.

Let I denote inches and F denote feet.

It is given that

I =k F or F=m I

So, I/F=k or m=F/I

As we know 1 feet = 12 inches

constant of proportionality i.e k=1/12

In case 2, constant of proportionality=12/1=12

So, Jada must have calculated ratio of feet to inches while Lin has calculated the ratio of inches to feet.

Step-by-step explanation:

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E. 16 min 12 sec

Step-by-step explanation:

Let x represent total time taken to complete the exercise.

We have been given that Dara ran on a treadmill that had a readout indicating the time remaining in her exercise session.

When the readout indicated 24 min 18 sec, she had completed 10% of her exercise session. This means that 90% time of exercise is equal to 24 minutes and 18 seconds.

18 seconds will be equal to 0.3 minutes.

Let us find total time of exercise as:

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$0.90x=24.3$

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Therefore, the readout will indicate 16 minutes 12 seconds, when Dara had completed 40% of her exercise session.

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3 years ago