Questions by Arun

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The expression for `8^(–2)` as a power with the base 2 is

asked Jan 17, 2022 in 8th-maths

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Very small numbers can be expressed in standard form by using _________

asked Jan 17, 2022 in 8th-maths

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The value of `3 xx 10^(-7)` is equal to

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 multiplicative inverse of `(3/2)^2` is not equal to

asked Jan 17, 2022 in 8th-maths

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`(2/3)^(-2) xx (2/3)^(-5) =

asked Jan 17, 2022 in 8th-maths

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The standard form for 0.000037 is `3.7 xx

asked Jan 17, 2022 in 8th-maths

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The standard form for 203000 is `2.03 xx

asked Jan 17, 2022 in 8th-maths

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The value of `5^(–2)` is equal to

asked Jan 17, 2022 in 8th-maths

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If `53^(x–1) -: 25 = 125`, find the value of

asked Jan 17, 2022 in 8th-maths

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Some migratory birds travel as much as 15,000 km to escape the extreme climatic conditions at home. Write the distance in metres using scientific

asked Jan 17, 2022 in 8th-maths

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`(2^n xx 2^6)/2^(-13) =

asked Jan 17, 2022 in 8th-maths

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An inch is approximately equal to 0.02543 metres. Write this distance in 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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One Fermi is equal to `10^(–15)` metre. The radius of a proton is 1.3 Fermis. Write the radius of a proton in metres in standard

asked Jan 17, 2022 in 8th-maths

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In a repeater machine with 0 as an exponent, the base machine is applied 0 times. (a) What do these machines do to a piece of chalk? (b) What do you think the value of 60

asked Jan 17, 2022 in 8th-maths

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Ajay had a 1cm piece of gum. He put it through repeater machine given below and it came out `1/100,000 cm` long. What is the missing value?

asked Jan 17, 2022 in 8th-maths

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Simplify: `((9) xx 27 xx t^4)/((3)^(-2) xx (3)^4 xx

asked Jan 17, 2022 in 8th-maths

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Arnav buys a book costing Rs 600. If the rate of sales tax is 7%, then the total amount payable by him is Rs

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

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