#### 609.6
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- Total for last 60 minutes: 2 × 172.8 = <<2*172.8=345.6>>345.6 signals.
- Total over 2 hours: 120 + 144 + 345.6 = <<120+144+345.6=609.6>>609.6 signals.
- Since signals are discrete, we keep the exact value.
- A plant biologist observed that a certain Arctic plant’s growth rate increases by 0.5 mm per day for every 1°C rise in average temperature. If the temperature rises from 8°C to 13.5°C over 10 days, by how much does the plant grow during this period, assuming linear temperature increase?
- Temperature increase: 13.5 – 8 = <<13.5-8=5.5>>5.5°C.
- Growth rate increase: 5.5 × 0.5 = <<5.5*0.5=2.75>>2.75 mm/day.
