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A sector of a circle of a radius 6cm subrends angle of 105 at the centre of a circle.calculate the perimeter of the sector and
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A student found the approximate value of 0.02548 correct to two places of decimal instead of two significant figures. Find the
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discuss critically the five religious principles that may impact positively on the issue of teenage pregnancy
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list:the different ways fossils can from
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using a rake instead of leaf blower
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The area of circle PQR with centre O is 72cmsquared.what is the area of sector PQR,if POR
=40squared
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If Mrs Ditiro's budget for transport, clothes and social expenses is R5 000,00, show by calculation that she can afford to
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Lizzy earn R20 000,00 per months she spend 3/8 on water and eletricity. The question say how much will she spend on eletricity
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Answers (14)
A close tin is the shape of a cylinder of diameter10cm and height15cm,use the value3.14for ^to find the total surface area of the in
An aircraft flew from to p to another q85km north of p. the aircraft then flew eastward from p. if the average speed of the plane is 700km 1.\PT/ the total time taken for the journey.
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R^2= y^2+ x^2 R^2=300^2+50^2 R^2=90,000+2,500 R^2=√92,500 R=304.14km/h
pardon me 25/1000*0.1=0.025 mole Kcl 50/1000*0.05=0.025 mole Kcl 1 mole KCl-39g K+ 0.025 moleKCl- 0.975g K+ 0.975/39=0.025 total mole=0.025*2=0.05 total volume=0.025+0.05=0.075 Concentration K+=mole/volume concentration=0.05/0.075 =0.67M
25/1000*0.1=0.025 mole Kcl 50/1000*0.05=0.025 mole Kcl 1 mole KCl-39g K+ 0.025 moleKCl- 0.975g K+ 0.975/74.5=0.013 total mole=0.013*2=0.026 total volume=0.025+0.05=0.075 Concentration K+=mole/volume concentration=0.026/0.075 =0.35M
density=mass/volume 13.55*3.2=43.36g 1 mole of Hg=200.59 0.2 mole=43.36g mole=number of atom/avogadroes number atom=0.2*6.02*10^23 atom=1.204*10^23
2C4H10 + 13O2---> 8CO2 + 10H2O Rmm of 1 mole oxygen=32g 13 mole=416g mass of 1 mole of butane=58g 2 mole=116g 116g C4H10 requires 416g O2 17.8 C4H10 will require 64g O2 excess butane=29.1-17.8=11.3g
S=at/2. 77=5t^2 t=15.4s range=vt R=261.8m
R=2GM/C^2 R=[2*6.67*10^-1*1.68*10^43]/9*10^16 R=2.5*10^16m
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