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grandson had to put ten names under 25 & then we have to tally frequency and then put on a bar chart he has no idear how to do it
Angle A is acute and such that tanA= square root of 6 over 3 show clearly that the exact value of sinA can be written in the form 1/5xsquared root of K and state the value of K
the motor for a lift in a tall building uses 12000 watts of power .the lift and its passengers has a mass of 500kg the lift motor takes 10 seconds to rise the lift and its passengers through a height of 20 metres work out the efficiecy of the lift motor