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Mathematical Process Standards>Applying Mathematics to Everyday Life and Work(TEKS.AQR.9-12.1.A) Practice Test
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Q1
An ERCOT summer electricity plan charges a fixed base fee of $8 per month plus tiered energy rates: first 500 kWh at $0.12/kWh, the next 1000 kWh (from 501 to 1500) at $0.15/kWh, and any usage above 1500 kWh at $0.20/kWh. Let $x$ be the monthly usage in kWh, and let $B(x)$ be the total energy charge in dollars. Which piecewise function correctly models $B(x)$?
An ERCOT summer electricity plan charges a fixed base fee of $8 per month plus tiered energy rates: first 500 kWh at $0.12/kWh, the next 1000 kWh (from 501 to 1500) at $0.15/kWh, and any usage above 1500 kWh at $0.20/kWh. Let $x$ be the monthly usage in kWh, and let $B(x)$ be the total energy charge in dollars. Which piecewise function correctly models $B(x)$?