Answer:
48:18
simplest for is 24:9
Step-by-step explanation:
X + y = 8
Replace y as y = y Insert x back into the original
x + x - 2 = 8 5 + y = 8
2x - 2 = 8 - 5 - 5
+ 2 + 2 y = 3
2x = 10 (5, 3)
--- ---
2 2
x = 5
9/15 as a percent is 60%, so D.
4 1/5 as a percent is 420%, so B.
I=10^(1-0.13x)
When I=4.2, then:
4.2=10^(1-0.13x)
ln 4.2=ln(10^(1-0.13x))
ln 4.2=(1-0.13x)ln (10)
1-0.13x=ln 4.2 / ln 10
-0.13 x=(ln 4.2 /ln 10)-1
x=[(ln 4.2/ ln 10)-1] /(-0.13)
x=-0.37675/(-0.13)
x=2.898...≈2.9
Answer: The depth of water at which most aquatic plansts recieve the requred light would be 2.9 m