Questions by sumit

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Factorise the expressions and divide them as directed: `(3x^2 – 48) -: (x –

asked Jan 17, 2022 in 8th-maths

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Find the value of a, if `8a = 35^2 –

asked Jan 17, 2022 in 8th-maths

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asked Jan 17, 2022 in 8th-maths

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For a fixed base, if the exponent decreases by 1, the number

asked Jan 17, 2022 in 8th-maths

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The value of `1/4^-2`

asked Jan 17, 2022 in 8th-maths

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If x be any non-zero integer, then `x^–1` is equal

asked Jan 17, 2022 in 8th-maths

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The standard form for 0.000064

asked Jan 17, 2022 in 8th-maths

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For any two non-zero rational numbers x and y, `x^4 -: y^4` is equal

asked Jan 17, 2022 in 8th-maths

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On dividing `8^5` by _________ we get

asked Jan 17, 2022 in 8th-maths

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The value for `(–7)^6 -: 7^6` is

asked Jan 17, 2022 in 8th-maths

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`(–5)^(–2) xx (–5)^(–3) =

asked Jan 17, 2022 in 8th-maths

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The usual form for `2 xx 10^(–2)` is not equal to

asked Jan 17, 2022 in 8th-maths

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Express the product of `3.2 xx 10^6` and `4.1 xx 10^(–1)` in the standard

asked Jan 17, 2022 in 8th-maths

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Special balances can weigh something as 0.00000001 gram. Express this number in the standard

asked Jan 17, 2022 in 8th-maths

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Consider a quantity of a radioactive substance. The fraction of this quantity that remains after t half-lives can be found by using the expression `3^(–t)`. (a) What fraction of substance remains after 7 half-lives? (b) After how many half-lives will the fraction be `1/243` of the

asked Jan 17, 2022 in 8th-maths

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The paper clip below has the indicated length. What is the length in standard form.

asked Jan 17, 2022 in 8th-maths

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The left column of the chart lists the lengths of input pieces of ribbon. Stretching machines are listed across the top. The other entries are the outputs for sending the input ribbon from that row through the machine from that column. Copy and complete the chart.

asked Jan 17, 2022 in 8th-maths

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Overhead charges, if any, are sometimes included in the cost

asked Jan 17, 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 17, 2022 in 8th-maths

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Suppose a certain sum doubles in 2 years at r % rate of simple interest per annum or at R% rate of interest per annum compounded annually. We

asked Jan 17, 2022 in 8th-maths

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