17. Its answer C i wil tell you the other one in a sec
A=LW, we are told that the dimensions are 42 and 48 so:
A=42*48
A=2016in^2
Answer: 43690
Step-by-step explanation:
Answer:
i thought i had the answer but then i got it wrong im sorry
Step-by-step explanation:
Answer:
I(7) = 22.96 W/m²
Step-by-step explanation:
Let intensity of light, be I(d) where d is distance. There must be a proportionality factor K such as
I(d) = K /d²
Now for d = 5 m I(d) = K* 1/d²
then 45 * 25 = K
K = 1125
To find the intensity when the distance from the light bulb is 7 m away
I(7) = K / 49
I(7) = 1125/49 W/m²
I(7) = 22.96 W/m²
