Maths gcse question HELP!?

the length of a ladder L is measured at 6.45 meters, correct to the nearest cm.the ladder leans against a wall and reaches to a height, h of 5 meters, measured to the nearest cm.the angle of inclination a, of the ladder to the horizontal ground can be found using the formula -sin a = h/Lwork out the upper bound of the value of sin a.give the answer to an appropriate degree of accuracy.its a 4 mark question! sorry for the essay! but any help would be fab, as i dont understand how to tackle it!thanks in advance.

Similar Asks:

  • Math Help?!?!?!?!? PLEASE HELP! HURRY BEST ANSWER 10 POINTS!? - Having some trouble with this course, need some help! Calc/Pre Calc any help is greatly apreciated! From a balloon 1191 feet high, the angle of depression to the ranger headquarters is 72°54′. How far is the headquarters from a point on the ground directly below the balloon (to the nearest foot)? 356 ft
  • Question about presentation of a dissertation? - I do a joint degree in two seperate subjects, so instead of the usual 10,000-15,000 word dissertation in either of them, I have to do a 5,000-6,000 essay for both of them, which are really just extended essays. However, on my grade sheet, it still goes under “dissertation”. What I’m wondering is, is it worth
  • PLEASE help me with this simple question!? - I have to answer this essay question but i cant because i don’t understand what it is asking, can someone please restate it for me in a simpler way? you dont have to answer the actual question, but you will get best answer!how do you account for the failure of Reconstruction (1865-1877) to bring social
  • Question on ‘Breton Woods Institution’ – Help Please? - Hi everyone I have an essay to write for Wednesday on the Breton Woods Institution, and it is for my Globalization/Global Economy unit. The question is:Critically evaluate the performance of the Breton Woods Institutions. What do you think should be done with these institutions in the future? I want to be able to understand
  • Formulas for surface area..? - of a triangular prism?just the formula! don’t give me an essay!and also the formula for a rectangular pyramids surface area User tags:from a balloon 915 feet high the angle of depression to the ranger headquarters is 85°14\ how far is the headquarters from a point on the ground directly below the balloon (to the nearest foot)?
  • Primary strenghts and weakenesses of how the prime minister is chosen and kept accountable to the ……..? - Hi-I need to write an essay on the below question but I really dont understand the question,since english isnt my native kanguage. I would totally appreciate it if you can clarify the question for me and give me some possible answers-points to start with.Please elaborate as much as possible.Thanks in advance!One of the more remarkable
  • Can anyone help me with this irish essay please im desperate!? - okay so the question that i got was:”Sa sliocht seo as an ùrscèal Lig Sinn i gCathù faighimid leàrgas greannmhar ar phearsana èagsùla san ollscoil’. Deàn plè gairid air sin i geàs beirt de na pearsana luadh sa sliocht.So what im guessing that the question means is write about the funny people in the story

3 Responses to “Maths gcse question HELP!?”

  1. starvedly says:

    The upper bound for a fraction uses the highest possible value for the top and the lowest possible value for the bottom. Answers given to the nearest cm can be 0.5 cm = 0.005 m more or less. In this case that issinA = 5.005 / 6.445 = 0.7766 (4 d. p.)EDIT. It could be argued that four decimal places is too much and so 0.777 or 0.78 but it is a matter of opinion.

  2. cot says:

    this is how it should be done…First change the metres into cm (500cm and 645cm)Find the upper bound of h= 500.5cmNext find the lower bound of L= 644.5cmTherefore 500.5/644.5 = 0.777 (appropriate degree of accuracy basically means a suitable number of figures)If u then want to find the actual angle of incline:The opposite of sin is sin inverse so, sin inverse 0.777sin-1(0.777)= 50.7°

  3. estereo says: