Based on the provided information about the metals' melting point, boiling point, and density, the response is A. The gold sample transitions from liquid to gas at the highest temperature, while the copper sample occupies the most volume. Gold's boiling point is the highest at 2660, and copper has the lowest density, which correlates with a larger volume since density is defined as mass divided by volume.
Each LED bulb, along with installation labor, is priced at
.. $6.95 +$3 = $9.95
For 100 bulbs over a span of 10 years, that equals (100*10) = 1000 bulb·years. At $9.95 per bulb, 5 bulb·years are obtained, and thus the projected total cost for 1000 bulb·years is
.. (1000 b·y)*($9.95/(5 b·y)) = $1990
In summary, for a decade, the installation and changes of 200 bulbs in 100 lamps amount to $1990. Therefore, the yearly cost is...
.. $1990/(10 yr) = $199/yr
La ganancia de Brad fue del 30%
Explicación adicional:
La ganancia es el dinero obtenido al vender un producto por encima de su costo original.
La fórmula para calcular la ganancia es:

Datos:
Precio de compra del paquete de bebidas energéticas = £9.25
Precio de venta por botella = £1
Precio total por 12 botellas = 1 * 12 = £12
Ganancia = Precio de venta - Precio de compra
= 12 - 9.25
= £2.75
Así, la ganancia de Brad fue de £2.75
Luego,
Porcentaje de ganancia = (Ganancia / Precio de compra) * 100
= (2.75 / 9.25) * 100
= 0.30 * 100
= 30%
La ganancia de Brad fue del 30%
Palabras clave: Ganancia, pérdida
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