You are building a deck on the back of your house. You need to find the area so you know the cost of the materials. Use the dime
nsions shown on the plan to find the area of the deck.
1 answer:
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Answer:
The cost of six magnets is $1.10
Step-by-step explanation:
The cost of 1 magnet = $ 0.20
Cost of 2 Magnets = $ 0.38
Now, the series of the cost of magnets is:
0.20 , 0.38, 0.56 , 0.74,...
Now, the above series forms an Arithmetic Progression as
0. 38 - 0. 20 = 0.18
and 0. 56 - 0. 38 = 0.18
Hence, the common difference of the series = 0.18
and first term of the series = 0.20
By , A.P a(n) = a + (n-1) d
⇒
or, a(6) = 0.20 + 0.9 = 1.1
or, the sixth term in the sequence is $1.1
Hence, the cost of six magnets is $1.1