Questions by krutika

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asked Jan 18, 2022 in 8th-maths

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The expontential form for `(–2)^4 xx (5/2)^4` is

asked Jan 18, 2022 in 8th-maths

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Express `16^(–2)` as a power with the base

asked Jan 18, 2022 in 8th-maths

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Express `27/64` and `(-27)/64` as powers of a rational

asked Jan 18, 2022 in 8th-maths

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Find the value of `x^(–3)` if `x = (100)^(1–4) -:

asked Jan 18, 2022 in 8th-maths

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Astronomy The table shows the mass of the planets, the sun and the moon in our solar system. (a) Write the mass of each planet and the Moon in scientific

asked Jan 18, 2022 in 8th-maths

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About 230 billion litres of water flows through a river each day. How many litres of water flows through that river in a week? How many litres of water flows through the river in an year? Write your answer in standard

asked Jan 18, 2022 in 8th-maths

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What will the following machine do to a 2 cm long piece of chalk?

asked Jan 18, 2022 in 8th-maths

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Shrinking Machine In a shrinking machine, a piece of stick is compressed to reduce its length. If 9 cm long sandwich is put into the shrinking machine below, how many cm long will it be when it emerges?

asked Jan 18, 2022 in 8th-maths

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Neha needs to stretch some sticks to `25^2` times their original lengths, but her `(xx2^5)` machine is broken. Find a hook-up of two repeater machines that will do the same work as a `(xx25^2)` machine. To get started, think about the hookup you could use to replace the `(xx2^5)` machine.

asked Jan 18, 2022 in 8th-maths

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Simplify: `((3^-2)^2 xx (5^2)-3 xx (t^(-3))^2)/((3^(-2))^5 xx (5^3)^(-2) xx

asked Jan 18, 2022 in 8th-maths

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Vishakha offers a discount of 20% on all the items at her shop and still makes a profit of 12%. What is the cost price of an article marked at Rs

asked Jan 18, 2022 in 8th-maths

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Suppose for the principal P, rate R% and time T, the simple interest is S and compound interest is C. Consider the

asked Jan 18, 2022 in 8th-maths

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For calculation of interest compounded half yearly, keeping the principal same, which one of the following is

asked Jan 18, 2022 in 8th-maths

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Radhika bought a car for Rs 2,50,000. Next year its price decreased by 10% and further next year it decreased by 12%. In the two years overall decrease per cent in the price of the car

asked Jan 18, 2022 in 8th-maths

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In the first year on an investment of Rs 6,00,000 the loss is 5% and in the second year the gain is 10%, the net result is

asked Jan 18, 2022 in 8th-maths

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Compound interest is the interest calculated on the previous year’s

asked Jan 18, 2022 in 8th-maths

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Selling price of 9 articles is equal to the cost price of 15 articles. In this transaction there is profit of `66 2/3

asked Jan 18, 2022 in 8th-maths

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The value of a car, bought for Rs 4,40,000 depreciates each year by 10% of its value at the beginning of that year. So its value becomes Rs 3,08,000 after three

asked Jan 18, 2022 in 8th-maths

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Sales tax is always calculated on the cost price of an item and is added to the value of the

asked Jan 18, 2022 in 8th-maths

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