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The wound, initially with an area of 90 cm2

, heals according to the formula

A(t) = 90(10

−0.023t), where A(t) is the area of the wound in square centimeters after t,

days of healing.

a) How big will the wound be once it is 70% healed? [1K]

b) In how many days will 70% of the wound be healed? [3T]
4 years ago

Answers

oobleck
If you mean A(t) = 90*10^(-0.023t) then
(a) 0.30 * 90
(b) 10^(-0.023t) = 0.30
4 years ago

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