Questions by sumit

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By multiplying `(10)^5` by `(10)^(–10)` we get

asked Jan 18, 2022 in 8th-maths

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The standard form of 12340000 is

asked Jan 18, 2022 in 8th-maths

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The usual form for `2.3 xx 10^(-10)` is

asked Jan 18, 2022 in 8th-maths

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`(–5)^(–2) xx (–5)^(–3) =

asked Jan 18, 2022 in 8th-maths

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Express each of the following in standard form: -1. (a) The mass of a proton in gram is `1673/1000000000000000000000000000` (b) A Helium atom has a diameter of 0.000000022

asked Jan 18, 2022 in 8th-maths

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An insect is on the 0 point of a number line, hopping towards 1. She covers half the distance from her current location to 1 with each hop. So, she will be at `1/2` after one hop, `3/4` after two hops, and so on. (a) Make a table showing the insect’s location for the first 10

asked Jan 18, 2022 in 8th-maths

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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

asked Jan 18, 2022 in 8th-maths

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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 18, 2022 in 8th-maths

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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

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Supply the missing information for each diagram. (a) (b) (c) (d)

asked Jan 18, 2022 in 8th-maths

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Simplify:

asked Jan 18, 2022 in 8th-maths

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

asked Jan 18, 2022 in 8th-maths

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Avinash bought an electric iron for Rs 900 and sold it at a gain of 10%. He sold another electric iron at 5% loss which was bought Rs 1200. On the transaction he has

asked Jan 18, 2022 in 8th-maths

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Amount when interest is compounded annually is given by the formula

asked Jan 18, 2022 in 8th-maths

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The compound interest on Rs 8,000 for one year at 16% p.a. compounded half yearly is _________, given that `(1.08)^2 =

asked Jan 18, 2022 in 8th-maths

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If amount on the principal of Rs 6,000 is written as 6000 `(1+5/100)^3` and compound interest payable half yearly, then rate of interest p.a. is _________ and time in years is

asked Jan 18, 2022 in 8th-maths

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Jyotsana bought a product for Rs 3,155 including 4.5% sales tax. Find the price before tax was

asked Jan 18, 2022 in 8th-maths

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Given the principal = Rs 40,000, rate of interest = 8% p.a. compounded annually. Find (a) Interest if period is one year. (b) Principal for 2nd year. (c) Interest for 2nd year. (d) Amount if period is 2

asked Jan 18, 2022 in 8th-maths

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Devangi’s phone subscription charges for the period 17-02-09 to 16-03-09 were as follows : Period Amount (in Rs) Service Tax % 17-02-09 to 23-02-09 199.75 12 24-02-09 to 16-03-09 599.25 10 Find the final bill amount if 3% education cess was also charged on service

asked Jan 18, 2022 in 8th-maths

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A dining table is purchased for Rs 3,200 and sold at a gain of 6%. If a customer pays sales tax at the rate of 5%. How much does the customer pay in all for the

asked Jan 18, 2022 in 8th-maths

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