Math Is Fun Forum

please help me again, thanks its just im really stuck.

1) in each of the following calculations, give your answer in STANDARD FROM TO FOUR SIGNIFICANT FIGURES.

a)148 200*2 531 000*583.2

b)0.0000731*0.0002859*0.03756

c)5.9*18.6*291.7
  ------------------
       515 284

d)3.65*258

thanks i know you must think in thick thanks for helping though.

2)calculate the volume of a cuboid, giving your answwer in STANDARD FORM TO FOUR DECIMAL PLACES.

THE BACK, SIDE LINE IS 0.000 002 56m
THE FRONT SIDE LINE IS 0.000 000 14m
THE BOTTOM LINE IS 0.000 275m

3)the staff car park at a hospital is cirular and of area 715 square metres. how far is it across the car park TO THE NEAREST METRE.?

4)a storage container is in the shape of a hemisphere. it can contain 550 cubic metres of liquid when it is full.
how far is it across the ontainer TO ONE DECIMAL PLACE.

thanks again for this help.

hi please could somone help me im sure im maths dislecsic. please help my maths tutor has given me some questions to answer and i cant seem to get my head around it at all. it might be that im just lazy and that im not really interested in maths but you never know iv tried and tried and tried and i still get the wrong answers can someone please help me!!!
here are some of the questions

1) a bicycle wheel has a diameter of 55cm.

a) how far is it round the wheel (1 d.p)?
b)if the wheel turns 50 times, calculate how far the bicycle has travelled. TO THE NEAREST CM?
C)HOW MANY TIMES (to the nearest whole number) WOULD THE WHEEL TURN IN A CYCLE RIDE OF 250 METRES?

2) the accss nursing home has a circular pond in the grounds. the pond is 100 metres acreoss and is surrounded by a narrow concrete path.as part of his recovery program, arthur wants to walk at least 1200 metres each day. how many times (TO THE NEAREST WHOLE NUMBER) should he walk around the pond to ensure that he covers this distance?

3)one method of measuring an irregular path is to use an odometer. this is a wheel attached to the handle by means of which it can be pushed along the irregular path. also attached to the whell is a device which counts the number of times the wheel is turned. one odometer has a 30cm diameter wheel and when pushed along a path through some woods turned 417 times. calculate the length of the path to the nearest metre.

Please could you help me with these i have more but i dont want to bombard you all so ill just try and get the jist of these first thanks from mandy

The yearly water bill for a child care centre consists of a standing charge of £18 and a rate of 40p for each unit of water used. i have to draw a graph which could be used to find the cost of water up to a maximum of 250 units. and i have to lable this water board A.

i have to use the graph to answer the following

1)   one year 200 units of water are used.what was the water bill for that year.

2) it is decided that the yearly water bill is to be reduced to a maximum of £80. what is the maximum number of units of water that should be used ?

later in the year, water board B sends some literature for their water costs. they make no standing charge, but instead make a single charge of 60p fpr each unit of water used.

so on that same sheet of graph paper i have to draw a line to show the cost of water from this water board to a mximum of 250 units.
then i have to lable this line water board B

1)at what number of water units do the two lines cross ?

2)how can this number be used to decide which water board to use ?

i have had so many goes at this graph and it is really really anoying me please can someone help me i would be very greatful.

thanks from mandy

hi, just thought i would come and say hello to you all, just to let you know i am really really rubbish at maths and you might see alot off me now that i have found this site lol.thank you to everyone that will help me and hi to you all

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