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The formula h -15 = 3.2t gives the height h in inches of a plant *t* weeks after planting. When was the height 31 inches?

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Question:

A
Sometime between 3 and 7 weeks.

explanation

h - 15 = 3.2t gives the height of a shrub in inches after t weeks. When the height is 31 inches 31 - 15 = 3.2t

3.2t = 16

t = 16 รท 3.2

t = 5

The height is 31 inches after 5 weeks

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