Answer:
3.8m
Step-by-step explanation:
Since Lara is putting lace trim around the border of a circular tablecloth, by the time she finishes she has covered the circumference.
The circumference of a circle is calculated using:
where d is the diameter of the circle.
It was given that the diameter of the circular table cloth is 1.2 meters.
Therefore the length of the lace she needed is 3.8m
Answer:
The interest rate for the given investment is 18%.
Step-by-step explanation:
We are given that,
The function representing the investment model is, .
It is required to find the interest rate for the investment.
Since, the function can be re-written as,
i.e.
So, on comparing with the formula for compound interest i.e. , where 'r' is the interest rate.
We have that,
The interest rate for the given investment is 0.18 i.e. 18%.