From sea level, a submarine descends 40 feet per
1 answer:
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Answer:
a = 3
Step-by-step explanation:
Calculate the distance d using the distance formula and equate to 4
d =
with (x₁, y₁ ) = (2, - 1) and (x₂, y₂ ) = (2, a)
d = =
=
= a + 1 then
a + 1 = 4 ( subtract 1 from both sides )
a = 3