<h2>Answer : 144 cents</h2>
Step by step explanation
<u>Given: cost of 21 inches of wire costs 63 cents</u>
<u>Cost of 1 inch wire = 63/21 = 3 cents</u>
<u>Cost of 48 inches of wire = 48×3 = 144 cents</u>
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1.<span> <span>Mt. Everest, the highest elevation in Asia, is 29,028 feet above sea level. The Dead Sea, the lowest elevation, is 1,312 feet below sea level. What is the difference between these two elevations?
</span></span>
Answer: b) 6
Step-by-step explanation:
Given : The illuminance of a surface varies inversely with the square of its distance from the light source.
i.e. for d distance and l luminance , we have
, where k is constant. (1)
If the illuminance of a surface is 120 lumens per square meter when its distance from a certain light source is 6 meters.
From (1), we have
(2)
For the distance (d) corresponds to the illuminance to 30 lumens per square meter , we have
![d^2\times 30=k](https://tex.z-dn.net/?f=d%5E2%5Ctimes%2030%3Dk)
Put value of k , we get
![d^2\times 30=4320\\\\\Rightarrow\ d^2=\dfrac{4320}{30}=144\\\\\Rightarrow\ d^2=144\\\\\Rightarrow\ d= 12](https://tex.z-dn.net/?f=d%5E2%5Ctimes%2030%3D4320%5C%5C%5C%5C%5CRightarrow%5C%20d%5E2%3D%5Cdfrac%7B4320%7D%7B30%7D%3D144%5C%5C%5C%5C%5CRightarrow%5C%20d%5E2%3D144%5C%5C%5C%5C%5CRightarrow%5C%20d%3D%2012)
Then , the number of meters should the distance of the surface from the source be increased= 12 meters- 6 meters = 6 meters.
Answer:
$4480
Step-by-step explanation:
From the question statement, we observe that
Principal=$4000, Interest rate=6 percent=.06 , No. of years=2 years
Interest= Principal×Interest rate×No. of years
Interest=4000×.06×2
Interest=$480
total= Interest+Principal
total= $4000+$480
total =$4480
She would have $4480 at the end of two years.