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The standard form for 203000 is `2.03 xx

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`a^m xx b^m =

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By what number should we multiply `(–29)^0` so that the product becomes

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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

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`6^n/6^(-2) =

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The cells of a bacteria double itself every hour. How many cells will there be after 8 hours, if initially we start with 1 cell. Express the answer in

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Predicting the ones digit, copy and complete this table and answer the questions that follow. (a) Describe patterns you see in the ones digits of the

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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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Consider a quantity of a radioactive substance. The fraction of this quantity that remains after t half-lives can be found by using the expression `3^(–t)`. (a) What fraction of substance remains after 7 half-lives? (b) After how many half-lives will the fraction be `1/243` of the

asked Jan 17, 2022 in 8th-maths

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Fill in the blanks

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Repeater Machine Similarly, repeater machine is a hypothetical machine which automatically enlarges items several times. For example, sending a piece of wire through a `(xx 2^4)` machine is the same as putting it through a (xx 2) machine four times. So, if you send a 3 cm piece of wire through a `(xx 2^4)` machine, its length becomes `3 xx 2 xx 2 xx 2 xx 2 = 48` cm. It can also be written that a base (2) machine is being applied 4 times. What will be the new length of a 4 cm strip inserted in

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Simplify:

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

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A jacket was sold for Rs 1,120 after allowing a discount of 20%. The marked price of the jacket

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40% of [100 – 20% of 300] is equal

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

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A man purchased a bicycle for Rs 1,040 and sold it for Rs 800. His gain per cent is

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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

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Harshna gave her car for service at service station on 27-05-2009 and was charged as follows: (a) 3.10 litres engine oil @ Rs 178.75 per litre and VAT @ 20%. (b) Rs 1,105.12 for all other services and VAT @ 12.5%. (c) Rs 2,095.80 as labour charges and service tax @10%. (d) 3% cess on service Tax. Find the bill

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Arunima bought household items whose marked price and discount % is as follows: Item Quantity Rate Amount Discount% (a) Atta 1 packet 200 200 16% (b) Detergent 1 packet 371 371 22.10% (c) Namkeen 1 packet 153 153 18.30% Find the total amount of the bill she has to

asked Jan 17, 2022 in 8th-maths

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