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
Answer:
20cm is the area of the shaded triangle
The answer to this is Janelle runs 3.8 times faster than jean
I hope this helps!!!!!!
9514 1404 393
Answer:
4
Step-by-step explanation:
Dilation centered at the origin multiplies each individual coordinate by the scale factor. Considering the x-coordinates of W and W', we have ...
scale factor = Wx'/Wx = -12/-3 = 4
The dilation scale factor is 4.