Questions by purvi

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By solving `(6^0 – 7^0) xx (6^0 + 7^0)` we get

asked Jan 17, 2022 in 8th-maths

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The expression for `3^5` with a negative exponent is

asked Jan 17, 2022 in 8th-maths

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Solve the following:(i) `100^(–10)` (ii) `2^(–2) xx 2^(–3)` (iii) `(1/2)^(-2) -:

asked Jan 17, 2022 in 8th-maths

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Express `3^(–5) xx 3^(–4)` as a power of 3 with positive

asked Jan 17, 2022 in 8th-maths

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Simplify: -1. `(2^5 -: 28) xx

asked Jan 17, 2022 in 8th-maths

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Find the value of x so that `(–2)^3 xx (–2)^(–6) =

asked Jan 17, 2022 in 8th-maths

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Divide 293 by 10,00,000 and express the result in standard

asked Jan 17, 2022 in 8th-maths

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Write 0.000005678 in the standard

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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Find x so that `(2/9)^3 xx (2/9)^(-6) =

asked Jan 17, 2022 in 8th-maths

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Investigating Solar System The table shows the average distance from each planet in our solar system to the sun. (a) Complete the table by expressing the distance from each planet to the Sun in scientific

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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The volume of the Earth is approximately `7.67 xx 10^(–7)` times the volume of the Sun. Express this figure in usual

asked Jan 17, 2022 in 8th-maths

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Two machines can be hooked together. When something is sent through this hook up, the output from the first machine becomes the input for the second. (a) Which two machines hooked together do the same work a `( xx 10^2)` machine does? Is there more than one arrangement of two machines that will work? (b) Which stretching machine does the same work as two `(xx 2)` machines hooked together?

asked Jan 17, 2022 in 8th-maths

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The diameter of the Sun is `1.4 xx 10^9` m and the diameter of the Earth is `1.2756 xx 10^7` m. Compare their diameters by

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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If 90% of x is 315 km, then the value of x

asked Jan 17, 2022 in 8th-maths

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If a % is the discount per cent on a marked price x, then discount

asked Jan 17, 2022 in 8th-maths

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A TV set was bought for Rs 26,250 including 5% VAT. The original price of the TV set

asked Jan 17, 2022 in 8th-maths

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_________ is a reduction on the marked price of the

asked Jan 17, 2022 in 8th-maths

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