Tarriq borrows R10 000 for 2 years. For the first 6 months, interest is calculated at 20% 2 p. a. compounded monthly. Thereafter, interest is calculated at 22% p. a. compounded monthly. How much does Tarriq owe after 2 years?

its electric no smoke

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answer: x=3 and y=4

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d.) yes, because the volume of the cone is greater than the volume of the sphere

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answers

\3. yes the presentation (i.e. odd numbers being written as differences of two squares) is possible for all odd natural number however the presentation may not be unique. for example,  57=112−82=292−28257=112−82=292−282.

\4. 2 can't be written as a difference of two squares because 4-1=3 and 1-1=0 and the difference of squares grows to integers larger that 3.

can i get some in proving questions 1 and 2?