The marked price of a vacuum cleaner is 20% more than the cost price. It is sold at a discount of 7%. If the marked price is 8000, then find the selling price, profit and profit percentage.

x = ± 6i

step-by-step explanation:

x^2 = -36

take the square root of each side

sqrt(x^2) = sqrt(-36)

we know sqrt(ab) = sqrt(a) sqrt(b)

x = ±sqrt(36) sqrt(-1)

we know that sqrt (-1) = i

x = ± 6i

the mistake in the pattern is that :

b. the decimal point was moved one too many place values each time

the correct pattern could be made by :

b. moving the decimal point to the right the same numbers of place values as the exponents

15 batches are the most you can make

step-by-step explanation:

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step-by-step explanation: