Answer:
Step-by-step explanation:
Isolate the term of x from one side of the equation.
<h3>-3/2x-3/4=-1/5</h3>
<u>First, add by 3/4 from both sides.</u>
<u>Solve.</u>
⇒ = -3/2x=11/20
<u>Then, you multiply by 2 from both sides.</u>
2(-3/2x)=11*2/20
<u>Solve.</u>
11*2/20
11*2=22
22/20
<u>Common factor of 2.</u>
11/10
-3x=11/10
<u>Divide by -3 from both sides.</u>
<u>Solve.</u>
- <u>Therefore, the correct answer is D. x=-11/30.</u>
I hope this helps! Let me know if you have any questions.
<h3>
Answer: 18pi</h3>
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Explanation:
The area 81pi square meters leads to the radius 9 meters
Use the formula A = pi*r^2 to see why this is the case. You plug in A = 81pi and solve for r to get r = 9.
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Once you know the radius, you can determine the circumference C
C = 2*pi*r
C = 2*pi*9
C = 2*9*pi
C = 18pi
The circumference is the perimeter, or distance, around the circle.
Answer:
64.5%
Step-by-step explanation:
Initial amount N° = ?
Remaining amount after decay = N = ?
k = decay constant = 0.00012 
t = time = 3650 year
fraction remaining will be N/N°
From the decay equation, N = N°
N/N° =
N/N° = 
N/N° = 
N/N° = 0.645 = 64.5%
