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A lake near the Arctic Circle is covered by sheet of ice during the cold winter months. When spring arrives, the ice starts to melt.\newlineS S models the ice sheet's thickness (in meters) after t t weeks.\newlineS=−0.25t+4 S = -0.25t + 4 \newlineWhat is the ice sheet's thickness at the beginning of spring?

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Q. A lake near the Arctic Circle is covered by sheet of ice during the cold winter months. When spring arrives, the ice starts to melt.\newlineS S models the ice sheet's thickness (in meters) after t t weeks.\newlineS=−0.25t+4 S = -0.25t + 4 \newlineWhat is the ice sheet's thickness at the beginning of spring?
  1. Identify Equation: Identify the given equation and what it represents.\newlineThe equation S=−0.25t+4S = -0.25t + 4 models the ice sheet's thickness (SS, in meters) after tt weeks. We need to find the thickness at the beginning of spring, which corresponds to the time t=0t = 0 weeks.
  2. Substitute t=0t=0: Substitute t=0t = 0 into the equation to find the thickness of the ice at the beginning of spring.S=−0.25(0)+4S = -0.25(0) + 4
  3. Perform Calculation: Perform the calculation.\newlineS=0+4S = 0 + 4\newlineS=4S = 4 meters

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