80% growth 20% growth
40% decay
40% growth
60% growth
20% decay
60% decay
80% decay
40(0.2)t = 1.6
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80(1.6)t = 20
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60(0.8)t = 1.4
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20(0.6)t = 1.2
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1.2(1.4)t = 80
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Expresa commuter train leaves downtown sation and travels at a average speed of 55 miles per hour towards the north side sation, which is 50miles away. thirty minutes later, express commuter train #7 leaves north side and travels at a average speed of 35miles per hour towards downtown sation. at the moment the two trains pass each other, how far(in miles) is train #12 from the downtown sation and how long(in minutes) has the #12 train been traveling

In the figure below, ∠dec ≅ ∠dce, ∠b ≅ ∠f, and segment df is congruent to segment bd. point c is the point of intersection between segment ag and segment bd, while point e is the point of intersection between segment ag and segment df. the figure shows a polygon comprised of three triangles, abc, dec, and gfe. prove δabc ≅ δgfe.

Heather is riding a quadratic function that represents a parabola that touches but does not cross the x-axis at x=-6