Answer:
8 days
Step-by-step explanation:
On day 8, Isabella will save 256 nickels, bringing her total to 510.
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The number of nickels saved on day n is 2^n. The total is 2^(n+1)-2.
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The above can be written down from your knowledge of binary sequences. If you want a more formal development, read on.
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The number of nickels saved on day n is a geometric sequence with first term 2 and common ratio 2. The n-th term of the sequence is ...
an = a1·r^(n-1) = 2·2^(n-1) = 2^n
The sum of n terms of the sequence is ...
S = a1(r^n -1)/(r -1) = 2(2^n -1)/(2-1)
S = 2^(n+1) -2
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We want S > 500, so ...
500 < 2^(n+1) -2
502 < 2^(n+1)
251 < 2^n
log(251) < n·log(2)
n > log(251)/log(2)
n > 7.97 . . . . . . . . 8 days or more to save more than 500 nickels
(I could answer more confidently if I had more context to the question)
I believe the answer to the question is Andre's neighbor pays Andre 10 dollars a week to mow his lawn.
Hope this helps, if not, comment below please!!
:L
Answer:
You can't synthetic divide since there's no dividend. As you can't factor it so I figure you must've forgot to include something or there's no solution.
Let the numbers be x , x+1 and x+2
Then:-
3x = x + 2 - 6
3x - x = -4
2x = -4
x = -2
So the 3 integers are -2, -1 and 0. answer
$15
Explanation:
For each lawn he mows = $5
<u>He should mow 6 lawns but did only 3 lawns as other 3 he forgot to mow.</u>
earned:
