Questions by krutika

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Express the following numbers in usual form. `5.8 xx 10^(12)`

asked Jan 17, 2022 in 8th-maths

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In a stack there are 5 books each of thickness 20mm and 5 paper sheets each of thickness 0.016 mm. What is the total thickness of the

asked Jan 17, 2022 in 8th-maths

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Rehman is making a wheel using spokes. He wants to fix equal spokes in such a way that the angles between any pair of consecutive spokes are equal. Help him bycompleting the following table. sss 8 → 45°, 10 → 36°, 12 → 30° sss Are the number of

asked Jan 17, 2022 in 8th-maths

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Factorise the following using the identity `a^2 – b^2 = (a + b) (a – b)`. `9x^2 – (3y +

asked Jan 17, 2022 in 8th-maths

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The following expressions are the areas of rectangles. Find the possible lengths and breadths of these rectangles. `17ab^2c^3 -:

asked Jan 17, 2022 in 8th-maths

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Factorise the expressions and divide them as directed: `(2x^3 – 12x^2 + 16x) -: (x – 2) (x –

asked Jan 17, 2022 in 8th-maths

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If `a^2 + b^2 = 74` and ab = 35, then find a +

asked Jan 17, 2022 in 8th-maths

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Verify the following: `(a + b) (a + b) (a + b) = a^3 + 3a^2b + 3ab^2 +

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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The human body has about 100 billion cells. This number can be written in exponential form

asked Jan 17, 2022 in 8th-maths

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The usual form of `3.41 xx 10^6` is

asked Jan 17, 2022 in 8th-maths

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The usual form for `2.3 xx 10^(-10)` is

asked Jan 17, 2022 in 8th-maths

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

asked Jan 17, 2022 in 8th-maths

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Simplify: -1. `(((-)/2)^(-2))^3 xx (1/3)^(-4) xx 3^(-1) xx

asked Jan 17, 2022 in 8th-maths

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Simplify: -1. `(49 xx z^(-3))/(7^(-3) xx 10 xx z^(-5))`

asked Jan 17, 2022 in 8th-maths

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By what number should `((-3)/2)^(-3)` be divided so that the quotient may be `(4/27)^(-2)`

asked Jan 17, 2022 in 8th-maths

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Use the properties of exponents to verify that each statement is true. (a) `1/4(2^n) = 2^(n-2)` (b) `4(n-1) = 1/4(4)^n` (c) `25(5^(n–2)) =

asked Jan 17, 2022 in 8th-maths

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The given table shows the crop production of a State in the year 2008 and 2009. Observe the table given below and answer the given questions. Crop 2008 Harvest (Hectare) Increase/Decrease (Hectare) in 2009 Bajra `1.4 × 10^3` – 100 Jowar `1.7 × 10^6` -440,000 Rice `3.7 × 10^3` – 100 Wheat `5.1 × 10^5` + 190,000 (a) For which crop(s) did the production decrease? (b) Write the production of all the crops in 2009 in their standard form. (c) Assuming the same

asked Jan 17, 2022 in 8th-maths

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For each hook-up, determine whether there is a single repeater machine that will do the same work. If so, describe or draw it (a) (b) (c) (d)(e)

asked Jan 17, 2022 in 8th-maths

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Supply the missing information for each diagram. (a) (b) (c) (d)

asked Jan 17, 2022 in 8th-maths

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