What is the answer to the question ?????!!!!!!
1 answer:
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Answer:
a₂₀ = - 137
Step-by-step explanation:
there is a common difference between consecutive terms , that is
7 - 15 = - 9 - (- 1) = - 17 - (- 9) = - 8
This indicates the sequence is arithmetic with nth term
= a₁ + (n - 1)d
where a₁ is the first term and d the common difference
here a₁ = 15 and d = - 8 , then
a₂₀ = 15 + (19 × - 8) = 15 + (- 152) = 15 - 152 = - 137
<h3><u>Answer</u>:- </h3>
Since painting is done on outer surface of cubical block we will have to find its surface area which is given by-
- <u>where a is side of the cube </u>
Now,
Thus it would cost $ 307.2 to paint the entire cubical block.