The illuminance on a surface is 3.5 lux, and the surface is 2 meters from the light source. what’s the intensity of the source?

The intensity is 49 Candelabra

The formula for calculation the luminous intensity is;

Luminous intensity = illuminance × square radius

Lv = Ev × r²

 = 3.5 × 2²

= 3.5 × 14

 = 49 Candelabra

the expression 15n + 2(3p) represents the amount isaiah spent buying gasoline and snacks, where n represents the price of each gallon of gasoline and p represents the cost of each snack that he bought. which statement is true about the amount isaiah spent?

where is the circuit diagram ?