Sally agreed a compound interest of 5.5% for a fixed term. If she invested £800 to this agreement, then what was her total at the end of 5 years?

£1045.57

Step-by-step explanation:

Using compound interest formula then

Where A= the future value of the investment/loan, including interest

P = the principal investment amount

r = the annual interest rate

n = the number of times that interest is compounded per unit t

Hence her amount t the end of 5 yrs is $1045.57

the direct variation says that:

then the equation is of the form is given by:

            where k is the constant variation.

from the given table:

consider any value of x and m(x)=y

x = 2 and m(x)=y = 3

substitute these value in [1]; we have;

divide both sides by 2 we get;

⇒

check:

put x = -1 and m(x) = -1.5

substitute in the equation:

-1.5 = -1.5                   true

therefore, the function m(x) represents a direct variation

graph of this function as shown below:

2160ft3

step-by-step explanation: