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Investigating Solar System The table shows the average distance from each planet in our solar system to the sun. (a) Complete the table by expressing the distance from each planet to the Sun in scientific

asked Jan 17, 2022 in 8th-maths

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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

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Sanchay put a 1cm stick of gum through a `(1 xx 3^(–2))` machine. How long was the stick when it came

asked Jan 17, 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 17, 2022 in 8th-maths

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Find three machines that can be replaced with hook-ups of `(xx 5)`

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A shirt with marked price Rs 800 was sold at Rs 680. The rate of discount allowed on the shirt

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Discount = Discount % of

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To calculate the growth of a bacteria if the rate of growth is known, the formula for calculation of amount in compound interest can be

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Discount is a reduction given on cost price of an

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Selling price of 9 articles is equal to the cost price of 15 articles. In this transaction there is profit of `66 2/3

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In Delhi University, in the year 2009 – 10, 49,000 seats were available for admission to various courses at graduation level. Out of these 28,200 seats were for the students of General Category while 7,400 seats were reserved for SC and 3,700 seats for ST. Find the per centage of seats available for

asked Jan 17, 2022 in 8th-maths

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What is the percentage increase or decrease in the number of seats won by A, B, C and D in the general elections of 2009 as compared to the results of 2004? Political party Number of seats wonin 2004 Number of seats wonin 2009 ABCD 206116411 1451382412

asked Jan 17, 2022 in 8th-maths

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Sunscreens block harmful ultraviolet (UV) rays produced by the sun. Each sunscreen has a Sun Protection Factor (SPF) that tells you how many minutes you can stay in the sun before you receive one minute of burning UV rays. For example, if you apply sunscreen with SPF 15, you get 1 minute of UV rays for every 15 minutes you stay in the sun. 1. A sunscreen with SPF 15 allows only `1/15` of the sun’s UV rays. What per cent of UV rays does the sunscreen abort? 2. Suppose a sunscreen allows 25% of the sun’s UV rays. a.

asked Jan 17, 2022 in 8th-maths

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Which of the following vary inversely with each

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If two quantities p and q vary inversely with each other,

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When two quantities x and y are in _______ proportion or vary ______ they are written as `x prop

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If x varies inversely as y, then x – 60 y 2

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If on increasing a, b decreases in such a manner that _______ remains ______ and positive, then a and b are said to vary inversely with each

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The perimeter of a circle and its diameter vary _______ with each

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If x varies inversely as y and x = 4 when y = 6, then when x = 3 the value of y is

asked Jan 17, 2022 in 8th-maths

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