19. The Palo Duro Canyon is 120 miles long, as much as 20 miles
wide, and has a maximum depth of more than 0.15 mile.
What is the approximate volume of this canyon?

step-by-step explanation:

1. practice, practice & more practice

2. review errors

3. master the key concepts

do not try to memorise the processes.

4. understand your doubts.

5. create a distraction free study environment

6. create a mathematical dictionary

7. apply maths to real world problems.

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it has to have an angle of 90 degrees

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