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

asked Jan 17, 2022 in 8th-maths by krutika (1.7k points)

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

asked Jan 17, 2022 in 8th-maths by vaibhav (1.7k points)

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

asked Jan 17, 2022 in 8th-maths by vaibhav (1.7k points)

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

asked Jan 17, 2022 in 8th-maths by Arun (1.7k points)

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Write 39,00,00,000 in the standard

asked Jan 17, 2022 in 8th-maths by krutika (1.7k points)

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Write 0.000005678 in the standard

asked Jan 17, 2022 in 8th-maths by uday (1.6k points)

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Express `(1.5 xx 10^6)/(2.5 xx 10^(-6))` in the standard

asked Jan 17, 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 17, 2022 in 8th-maths by nishit (1.8k points)

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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 by uday (1.6k points)

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This table shows the mass of one atom for five chemical elements. Use it to answer the question given. Element Mass of atom (kg) TitaniumLeadSilverLithiumHydrogen `7.95 × 10^(–26)` `3.44 × 10^(–25) ``1.79 × 10^(–25)``1.15 × 10^(–26)``1.674 × 10^(–27) `

asked Jan 17, 2022 in 8th-maths by purvi (1.8k points)

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This table shows the mass of one atom for five chemical elements. Use it to answer the question given. Element Mass of atom (kg) TitaniumLeadSilverLithiumHydrogen `7.95 × 10^(–26)` `3.44 × 10^(–25) ``1.79 × 10^(–25)``1.15 × 10^(–26)``1.674 × 10^(–27) `

asked Jan 17, 2022 in 8th-maths by yogita (1.8k points)

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A half-life is the amount of time that it takes for a radioactive substance to decay to one half of its original quantity. Suppose radioactive decay causes 300 grams of a substance to decrease to `300 xx 2^(–3)` grams after 3 half-lives. Evaluate `300 xx 2^(–3)` to determine how many grams of the substance are left. Explain why the expression `300 xx 2^(–n)` can be used to find the amount of the substance that remains after n

asked Jan 17, 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 17, 2022 in 8th-maths by uday (1.6k points)

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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 by nishit (1.8k points)

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Find two repeater machines that will do the same work as a `(xx 81)`

asked Jan 17, 2022 in 8th-maths by yogita (1.8k points)

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The left column of the chart lists the lengths of input chains of gold. Repeater machines are listed across the top. The other entries are the outputs you get when you send the input chain from that row through the repeater machine from that column. Copy and complete the chart.

asked Jan 17, 2022 in 8th-maths by Arun (1.7k points)

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Find x -1. (1) `-(1/7)^(-5) -: -(1/7)^(-7) = (-7)^x` (2) `(2/5)^(2x+6) xx (2/5)^3 =

asked Jan 17, 2022 in 8th-maths by uday (1.6k points)

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

asked Jan 17, 2022 in 8th-maths by sumit (1.6k points)

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Simplify:

asked Jan 17, 2022 in 8th-maths by yogita (1.8k points)

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

asked Jan 17, 2022 in 8th-maths by nishit (1.8k points)

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