Question

Laurie was scuba diving. Each time she dove 5 feet deeper, she would stop and clear her ears. Each time that this totaled 20 feet deeper, she would stop and check her instruments to make sure they were working properly. After Laurie had checked her instruments 3 times, she was at her maximum depth. Which expression best represents Laurie’s maximum depth?

Answer 1

Answer:

The answer is A.

Step-by-step explanation:

(4)(-5)(3) best represents Laurie’s maximum depth.

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Answer 2

Laurie's maximum depth can be represented using the expressions :

• (20 × 3) = 60
• (3 × 4 × 5) = 60

Each depth level at which ears are checked = 5 feets

Each Depth level at which instruments are checked = 20 feets

For Laurie to check her instrument ;

• Number of times ears are checked = 20/5 = 4 times

This means that for Laurie to have checked her instrument 3 times :

• (4 × 3 × 5) = 60 feets

Therefore, Laurie's maximum depth can be expressed as (4 × 3 × 5) = 60 feets

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