Answer:
The answer is 70 feet
Step-by-step explanation:
<h3><u>Given</u>;</h3>
- The area of therectangular billboard covered by the ribbon was approximately 4200 square feet
- The width of the billboard was approximately 60 feet.
<h3><u>To </u><u>Find</u>;</h3>
- The height of this billboard = ?
<h3><u>Formula</u>;</h3>
Here, We know the area so,
Area = Width × Height
Height = Area ÷ Width
H = 4200 ÷ 60 feet
H = 70 feet
Thus, The height of the billboard is 70 feet
<u>-TheUnknownScientist 72</u>
A resposta é oito. :))))))
Answer:
The answer is D ⇒ -4log(-x + 4)
Step-by-step explanation:
From the graph we chose the point of x-intercept (3 , 0)
∵ f(x) = -4log(-x + 4)
∴f(3) = -4log(-3 + 4) = -4log(1)
∵ log(1) = 0
∴f(3) = 0
If x = 0
∴ f(0) = -4log(0 + 4) = -4log4 = -2.40 ⇒ same value on the graph
∴ The answer is (D)
Radioactive half-life is the time it takes for half an amount of radioactive material to decay into something else. In this case, it is assumed that the decay product is not radioactive or otherwise hazardous.
We must use the radioactive decay formula to determine at what time the radiation reaches a safe level.
A = Ao[e^(-0.693)(t)(t 1/2) where t 1/2 is the half-life, t is elapsed time, Ao is the original quantity, A is the future quantity.
We are given a half-life of 2.4 days , an Ao of 1.25 and an A of 1.00:
1.00 = (1.25)e^(-0.693)(2.4)t
1.00/1.25 = e^(-1.6632)t
0.8 = e^(-1.6632)t
t = 0.135 days = 3 hrs 15 min
This is the amount of time to a "safe level" using only radioactive decay, not venting or other means.
The simple answer is if you don't read into the question is. 84) divided by 7 which is 12%
