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sineoko [7]
3 years ago
8

Calculați: [(8+8:8):9+(9+9:9):10-1]-1.

Mathematics
1 answer:
olchik [2.2K]3 years ago
3 0
: sign means ratio
ration can said divide mark
<span>[(8+8:8):9+(9+9:9):10-1]-1
[(8+1):9+(9+1):10-1]-1
[(9:9)+(10:10)-1]-1
[1+1-1]-1
1-1
0</span>
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A King in ancient times agreed to reward the inventor of chess with one grain of wheat on the first of the 64 squares of a chess
maxonik [38]

Answer:

Total weight of the wheat placed on 45th square will be = 1.26\times 10^{6}tons

Step-by-step explanation:

King rewarded the inventor of chess by giving grain of wheat on every square of the chess board. He places one  grain of wheat on first square, 2 on second, 4 on 3rd, 8 on 4th and so on.

In fact he places grains of wheat in a progression S = 1, 2, 4, 8, 16.........n terms where value of n is 64.

We can rewrite the progression as S = 2°, 2, 2², 2³,.........n terms (n = 64)

In a geometric progression we know the nth term = a(r^{n-1})

where a = first term of the series, r = common ratio, n = number of terms

Now we have to calculate the weight of all wheat placed on 45th square.

So we will put the values in the given formula 45th term =

1\times (2^{45-1}) = 2^{44}=1.76\times 10^{13}

Then the weight of wheat will be = 2.51\times 10^{9}pounds=1.26\times 10^{6}tons



7 0
3 years ago
1. One liter is equal to 1,000<br> milliliters. How many liters are<br> equal to 18,045 milliliters?
aksik [14]

Answer:

18.045

Step-by-step explanation:

because you will have 18liters and because of 045 you would let it stay the same and instead of a coma you would put a period.

hop this helps

4 0
2 years ago
In how many years will rupees 150 double itself at 4% S.I.?​
nikitadnepr [17]

Answer:

Simple interest = PRT/100

300 = 150 x 4 x T/100

2 x 100/4 = T

Therefore T = 50 years

Hope this helps!

7 0
3 years ago
If x=6 and y=−4, evaluate the following expression:10−4xy​
melomori [17]

Step-by-step explanation:

10 - 4(6) (-4)

10 - 4(-24)

10 + 96 = 106

3 0
3 years ago
Read 2 more answers
The slope of a line is -3. Find the slope of a line that is perpendicular to this line.
nataly862011 [7]
<span>The slope of a line is -3
</span><span>perpendicular  lines, slope is opposite and reciprocal
so </span><span>the slope of a line that is perpendicular to this line will be 1/3

answer
</span><span>C.1/3</span>
8 0
3 years ago
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