9514 1404 393
Answer:
8.6
Step-by-step explanation:
The growth factor per year is 1.012, so in 500 years is ...
1.012^500
The number of doublings is the solution to ...
2^n = 1.012^500
Taking logarithms, we have ...
n·log(2) = 500·log(1.012)
n = 500·log(1.012)/log(2) ≈ 8.6046
About 8.6 doublings will take place in 500 years.
Answer:
20 Divided By 5 = 4 or 5 x4 = 20
Step-by-step explanation:
Answer:
B
Step-by-step explanation:
25% of 800 is 200, so 800-200 is 600
Answer:
Option B, -1/2
Step-by-step explanation:
<u>The slope is change in y over change in x.</u>
<u />
<em>Since this line is facing downward, we already know that the slope is negative.</em>
<em />
<u>To find the ratio, find the change in y and divide the change in x.</u>
<em>Change in y = -1</em>
<em>Change in x = 2</em>
<em />
<u>Change in y over change in x:</u> <em>-1/2</em>
Answer: Option B, -1/2
Answer:
Area_lawn = 393.75 π ft^2
Step-by-step explanation:
Maximum radius : 30 feet
Minimum radius: 30 feet - 0.25*(30feet) = 22.5 feet
(25 percent reduction)
To find the area of lawn that can be watered, we just need to calculate the area for the maximum radius and the minimum radius, and then subtract them.
Since the sprinklers have a circular area:
Area = π*radius^2
Max area = π*(30 ft)^2 = 900π ft^2
Min area = π*(22.5 ft)^2 = 506.25π ft^2
Maximum area of lawn that can be watered by the sprinkler:
Area_lawn = Max area - Min area = 900π ft^2 -506.25π ft^2
Area_lawn = 393.75 π ft^2
