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50 =

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

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The standard form of 12340000 is

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

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The value for `(–7)^6 -: 7^6` is

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

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The value of `[1^(–2) + 2^(–2) + 3^(–2)] xx 6^2` is ________

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

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`(–5)^(–2) xx (–5)^(–3) =

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

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The expontential form for `(–2)^4 xx (5/2)^4` is

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

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Express as a power of a rational number with negative exponent. (a) `(((-3)/2)^(-2))^(-3)` (b) `(2^5 -: 2^8) xx

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

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

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

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By what number should `(–15)^(–1)` be divided so that quotient may be equal to `(–15)^(–1)`

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

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Find the multiplicative inverse of `(–7)^(–2) -:

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

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The number of red blood cells per cubic millimetre of blood is approximately 5.5 million. If the average body contains 5 litres of blood, what is the total number of red cells in the body? Write the standard form. (1 litre = 1,00,000

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

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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 by yogita (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 krutika (1.7k points)

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At the end of the 20th century, the world population was approximately `6.1 xx 10^9` people. Express this population in usual form. How would you say this number in

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

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While studying her family’s history. Shikha discovers records of ancestors 12 generations back. She wonders how many ancestors she has had in the past 12 generations. She starts to make a diagram to help her figure this out. The diagram soon becomes very complex. (a) Make a table and a graph showing the number of ancestors in each of the 12

asked Jan 17, 2022 in 8th-maths by uday (1.6k 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 nishit (1.8k points)

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For the following repeater machines, how many times the base machine is applied and how much the total stretch is?

asked Jan 17, 2022 in 8th-maths by nishit (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 17, 2022 in 8th-maths by yogita (1.8k 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 17, 2022 in 8th-maths by krutika (1.7k points)

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By what number should `(–15)^(–1)` be divided so that the quotient may be equal to

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

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