Under his cell phone plan, Joseph pays a flat cost of $48 per month and $3 per gigabyte, or part of a gigabyte. (For example, if
1 answer:
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Answer:
(a)
(b)
(c)
Step-by-step explanation:
Given
Variation: Direct
Represent ear pressure with p and depth with d.
So, we have:
when
Solving (a): Write a variation
We have:
Write as an equation
Where: k is the constant of variation
when
So, we have:
Make k the subject
Substitute 0.43 for k in
Solving (b): Pressure at 50 feet
Substitute 50 for d in
The pressure is 21.5 pounds per square
Solving (c): The safe depth
The safe depth stops at a pressure of 65psi.
Substitute 65 for p in
Make d the subject
-- approximated
<em>The safe distance for an amateur is 151.163ft</em>