Answer:
Just substitute each number into the expression:
5(5) - 6(3) + 20(1/4)/4(3)(1/4) = 25 - 18 + 5/3 = 7 + 5/3 = 26/3 or 8 and 2/3.
Step-by-step explanation:
For this case we have an equation of the form:
y = A * (b) ^ t
Where,
A: initial amount
b: decrease rate
t: time in years.
Substituting values we have:
7 = A * (0.5) ^ ((1/20) * t)
For t = 45 years we have:
7 = A * (0.5) ^ ((1/20) * 45)
Clearing A:
A = 7 / ((0.5) ^ ((1/20) * 45))
A = 33.3
Answer:
the density of the substance when it was deposited 45 years ago was:
A = 33.3 milligrams per square centimeter
Answer:
1:4
Step-by-step explanation:
1:4 Answer:1:4Step-by-step explanation:A ratio can be written like this: 15:60, but it can also be written as the fraction 15/60, which can be simplified to 1/4, or… ... A zoo has 15 toucans and 60 parrots. what is the ratio of the Number of toucans ... 4.9/5. 19. jupiterbhanot. Beginner. 5 answers. 51 people helped ...
Hope This Help!!
Answer:
45
Step-by-step explanation:
