In what time will 64000 amount to 68921 at a rate of 5 % per annum comp half yearly

Time = T half–years , Rate =5% per half year

2

Step-by-step explanation:

we know the formula:

68921=64000（1+0.05/2)^2t

or,68921/64000=（41/40)^2t

or, （41/40)^3=（41/40)^2t

or 2t=3

or, t=3/2 years

for this case we have by definition, if two lines are perpendicular, then the product of their slopes is -1.

then, given the following line:

so,

we are looking for m_ {2}:

then, the line is given by:

we find "b" replacing the given point:

finally, the equation is:

option c

explanation:

step-by-step explanation: