Question

After being exposed to an electromagnetic shrinking machine, Joe's height decreased by 120 cm over 1.5, point, 5 seconds. His height decreased by the same amount each second. How much did Joe's height change each second?

Answer 1

It is given that Joe was being exposed to an electromagnet shrinking machine. Because of this his height started decreasing .

Given,

The decrease was at a constant rate per second.

In 1.5sec, the height is decreased by 120cm.

So,

Variation per second =

$\frac{120}{1.5} \\ = \frac{1200}{15} \\ = 80cm$

Change in each second would be with negative sign indicate's decrease .

Hence, Answer is “-80” .

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Answer 2

Answer:

-80 cm

Step-by-step explanation:

Let's think about what the events in this situation mean mathematically.

Joe's height decreased by 120 cm

over 1.5

We can use the equation

-120 \ 1.5=

−120÷1.5=

-1200÷15  to find the change in Joe's height each second.

Joe's height changed −80 cm  each second.

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