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Evaluate. `(– 4)^(– 2)`

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

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Simplify and express the result in power notation with positive exponent. `(3^(– 7) ÷ 3^(– 10)) xx 3^(– 5)`

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

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Simplify and express the result in power notation with positive exponent. `2^(– 3) xx (–7)^(–

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

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Evaluate `(5^(–1) xx 2^(–1)) xx

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

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Simplify. `(25xxt^(-4))/(5^(-3)xx10xxt^(-8))

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

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Express the following numbers in standard form. 6020000000000000

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

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Express the number appearing in the following statements in standard form. Size of a bacteria is 0.0000005

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

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The cost of 5 metres of a particular quality of cloth is Rs 210. Tabulate the cost of 2, 4, 10 and 13 metres of cloth of the same

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

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The scale of a map is given as 1:30000000. Two cities are 4 cm apart on the map. Find the actual distance between

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

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In a model of a ship, the mast is 9 cm high, while the mast of the actual ship is 12 m high. If the length of the ship is 28 m, how long is the model

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

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A contractor estimates that 3 persons could rewire Jasminder’s house in 4 days. If, he uses 4 persons instead of three, how long should they take to complete the

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

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A car takes 2 hours to reach a destination by travelling at the speed of 60 km/h. How long will it take when the car travels at the speed of 80

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

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Factorise the following using the identity `a^2 – b^2 = (a + b) (a – b)`. `9x^2 – (3y +

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

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If x – y = 13 and xy = 28, then find `x^2 +

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

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Multiplicative inverse of `2^7`

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

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The distance between earth and sun is 150 million kilometres which can be written in exponential form as

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

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Very small numbers can be expressed in standard form by using _________

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

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The usual form of `2.39461 xx 10^6` is

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

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The value of `3 xx 10^(-7)` is equal to

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

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

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

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