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The standard form of 12340000 is

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The value of `[3^(–1) xx 4^(–1)]^2` is

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

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The multiplicative inverse of `(3/2)^2` is not equal to

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`5^0 =

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`(–2)^0 =

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`(-8/2)^0 =

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`(–6)^0 =

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The value of `(1/4)^(-2)` is equal to

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`a^p xx b^q =

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

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The cells of a bacteria double in every 30 minutes. A scientist begins with a single cell. How many cells will be there after (a) 12 hours (b) 24

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The planet Uranus is approximately 2,896,819,200,000 metres away from the Sun. What is this distance in standard

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About 230 billion litres of water flows through a river each day. How many litres of water flows through that river in a week? How many litres of water flows through the river in an year? Write your answer in standard

asked Jan 17, 2022 in 8th-maths by nishit (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 sumit (1.6k 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?

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By selling 50 pens, a shopkeeper lost the amount equal to the selling price of 10 pens. His loss per cent is

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

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Suppose for the principal P, rate R% and time T, the simple interest is S and compound interest is C. Consider the

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

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Amount when interest is compounded annually is given by the formula

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The time period after which the interest is added each time to form a new principal is called the

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

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