-3/4 B=21 solve for B B= −252 B = −28 B = 28 B= 252
2 answers:
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Answer:
The light intensity at a depth of 24 feet is 3.0143 lumens.
The light intensity will be 7 lumenus at the depth of 9.3732 feet approximately.
Step-by-step explanation:
Consider the provided formula.
Where I is the intensity of light and x is the depth.
Part (A) Find the light intensity at a depth of 24 feet.
Substitute x=24 in above formula.
Hence, the light intensity at a depth of 24 feet is 3.0143 lumens.
Part (B) At what depth is the light intensity 7 lumens
Substitute I=7 in above formula.
Hence, the light intensity will be 7 lumenus at the depth of 9.3732 feet approximately.
Whatever% of anything is just (whatever/100) * anything.
thus, what is 80% of M, well is just (80/100) * M,
what is 50% of N? well is just (50/100) * N.
we know they're both equal, thus
thus, what is 80% of M, well is just (80/100) * M,
what is 50% of N? well is just (50/100) * N.
we know they're both equal, thus