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

asked Jan 18, 2022 in 8th-maths by krutika (1.7k points)

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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 18, 2022 in 8th-maths by Arun (1.7k points)

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

asked Jan 18, 2022 in 8th-maths by Arun (1.7k points)

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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 18, 2022 in 8th-maths by yogita (1.8k points)

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Stretching Machine Suppose you have a stretching machine which could stretch almost anything. For example, if you put a 5 metre stick into a `(xx 4)` stretching machine (as shown below), you get a 20 metre stick. Now if you put 10 cm carrot into a `(xx 4)` machine, how long will it be when it comes out?

asked Jan 18, 2022 in 8th-maths by Arun (1.7k points)

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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 18, 2022 in 8th-maths by Simran (1.8k points)

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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 18, 2022 in 8th-maths by sumit (1.6k points)

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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 by krutika (1.7k points)

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Find three machines that can be replaced with hook-ups of `(xx 5)`

asked Jan 18, 2022 in 8th-maths by vaibhav (1.7k points)

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If a = – 1, b = 2, then find the value of the following: (1) `a^b + b^a` (2) `a^b – b^a` (3) `a^b xx b^2` (4) `a^b ¸

asked Jan 18, 2022 in 8th-maths by uday (1.6k points)

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Simplify: `(4/13)^4 xx (13/7)^2 xx

asked Jan 18, 2022 in 8th-maths by sumit (1.6k points)

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Find the compound interest on Rs 48,000 for one year at 8% per annum when compounded half

asked Jan 18, 2022 in 8th-maths by vaibhav (1.7k points)

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Shyama purchases a scooter costing Rs 36,450 and the rate of sales tax is 9%, then the total amount paid by her

asked Jan 18, 2022 in 8th-maths by nishit (1.8k points)

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Latika bought a teapot for Rs 120 and a set of cups for Rs 400. She sold teapot at a profit of 5% and cups at a loss of 5%. The amount received by her

asked Jan 18, 2022 in 8th-maths by vaibhav (1.7k points)

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When principal P is compounded semi-annually at r % per annum for t years, then Amount =

asked Jan 18, 2022 in 8th-maths by nishit (1.8k points)

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The buying price of 5 kg of flour with the rate Rs 20 per kg, when 5% ST is added on the purchase is Rs

asked Jan 18, 2022 in 8th-maths by yogita (1.8k points)

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Three bags contain 64.2 kg of sugar. The second bag contains `4/5` of the contents of the first and the third contains `42 1/2%` of what there is in the second bag. How much sugar is there in each

asked Jan 18, 2022 in 8th-maths by uday (1.6k points)

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Find discount in per cent when (a) M.P. = Rs 625 and S.P. = Rs 562.50 (b) M.P. = Rs 900 and S.P. = Rs

asked Jan 18, 2022 in 8th-maths by vaibhav (1.7k points)

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The marked price of an article is Rs 500. The shopkeeper gives a discount of 5% and still makes a profit of 25%. Find the cost price of the

asked Jan 18, 2022 in 8th-maths by yogita (1.8k points)

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In the year 2001, the number of malaria patients admitted in the hospitals of a state was 4,375. Every year this number decreases by 8%. Find the number of patients in

asked Jan 18, 2022 in 8th-maths by krutika (1.7k points)

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