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Express `16^(–2)` as a power with the base
asked
Jan 17, 2022
in
8th-maths
marks2
chapter8
#sub
0
votes
0
answers
Find the value of x so that `(–2)^3 xx (–2)^(–6) =
asked
Jan 17, 2022
in
8th-maths
marks2
chapter8
#sub
0
votes
0
answers
Find the value of `x^(–3)` if `x = (100)^(1–4) -:
asked
Jan 17, 2022
in
8th-maths
marks2
chapter8
#sub
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votes
0
answers
Find the multiplicative inverse of `(–7)^(–2) -:
asked
Jan 17, 2022
in
8th-maths
marks2
chapter8
#sub
0
votes
0
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Pluto is 59,1,30,00, 000 m from the sun. Express this in the standard
asked
Jan 17, 2022
in
8th-maths
marks2
chapter8
#sub
0
votes
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answers
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
marks2
chapter8
#sub
0
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0
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Find x so that `(2/9)^3 xx (2/9)^(-6) =
asked
Jan 17, 2022
in
8th-maths
marks2
chapter8
#sub
0
votes
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A new born bear weighs 4 kg. How many kilograms might a five year old bear weigh if its weight increases by the power of 2 in 5
asked
Jan 17, 2022
in
8th-maths
marks3
chapter8
#sub
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Two machines can be hooked together. When something is sent through this hook up, the output from the first machine becomes the input for the second. (a) Which two machines hooked together do the same work a `( xx 10^2)` machine does? Is there more than one arrangement of two machines that will work? (b) Which stretching machine does the same work as two `(xx 2)` machines hooked together?
asked
Jan 17, 2022
in
8th-maths
marks3
chapter8
#sub
0
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0
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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 17, 2022
in
8th-maths
marks3
chapter8
#sub
0
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Find two repeater machines that will do the same work as a `(xx 81)`
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Jan 17, 2022
in
8th-maths
marks3
chapter8
#sub
0
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The left column of the chart lists the lengths of input chains of gold. Repeater machines are listed across the top. The other entries are the outputs you get when you send the input chain from that row through the repeater machine from that column. Copy and complete the chart.
asked
Jan 17, 2022
in
8th-maths
marks3
chapter8
#sub
0
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Simplify: `(1/2)^2-(1/4)^(3-1) =
asked
Jan 17, 2022
in
8th-maths
marks3
chapter8
#sub
0
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Simplify: `((3^-2)^2 xx (5^2)-3 xx (t^(-3))^2)/((3^(-2))^5 xx (5^3)^(-2) xx
asked
Jan 17, 2022
in
8th-maths
marks3
chapter8
#sub
0
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0
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The discount per cent is calculated on the _________ price of an
asked
Jan 17, 2022
in
8th-maths
marks1
chapter9
#fib
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Amna purchased a toy for Rs 660 including sales tax. If the rate of sales tax is 10%, then the selling price of the toy is
asked
Jan 17, 2022
in
8th-maths
marks1
chapter9
#fib
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After allowing a discount of 15% on the marked price of an article, it is sold for Rs 680. The marked price of the article is Rs
asked
Jan 17, 2022
in
8th-maths
marks1
chapter9
#tnf
0
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0
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The original price of a washing machine which was bought for Rs 13,500 inclusive of 8% VAT
asked
Jan 17, 2022
in
8th-maths
marks1
chapter9
#mcq
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0
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The cost price of 10 tables is equal to the sale price of 5 tables. The profit per cent in this transaction is
asked
Jan 17, 2022
in
8th-maths
marks1
chapter9
#fib
0
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0
answers
The buying price of 5 kg of flour with the rate Rs 20 per kg, when 5% ST is added on the purchase is Rs
asked
Jan 17, 2022
in
8th-maths
marks1
chapter9
#tnf
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