QUESIION $21$

$(4$ Marks$)$

Consider the table which shows the quarterly sales of a correany for $2021$ and $2022$

$\backslash$table$[[$YEAR$,$QUARTER,SALES $($R $000)],[2021,1,800],[,2,740],[,3,900],[,4,860],[2022,1,950],[,2,770],[,3,990],[,4,1020]]$

The second centred average is:

A$.84375$

B$.82500$

$881\mathrm{.}25$

$865\mathrm{.}25$

QUESTION $22$

$(4$ Marks$)$

How long will it take an amount of money to quadruple in value if the interest rate offered is $18\%$ per annum compounded yearly?

A$.8\mathrm{.}1$ years

B$.9\mathrm{.}6$ years

C$.8\mathrm{.}4$ years

D$.9\mathrm{.}2$ years

QUESTION $23$

$(4$ Marks$)$

R $2$ x is invested for five years. Three years after the initial investment, another $Rx$ is deposited into the account. The interest rate for the first thee years is $16\%$ per annum compounded quarterly and for the reat two years it changes to $8\%$ per arnum compounded monthly. The value of $x$ is:

A$.$ R $14000$

B$.$ R $15000$

C$.$ R $15000$

D$.$ R $30000$