5. How many members are in set [tex]$Q$[/tex]?
A. 2
B. 5
C. 3
D. 8

6. Find the interest on GH₵ 400.00 for 2 years at [tex]$10\%$[/tex] simple interest per annum.
A. GH₵ 8.00
B. GH₵ 60.00
C. GH₵ 40.00
D. GH₵ 80.00

7. The area of a rectangle is [tex]$18 \, cm^2$[/tex]. If the width is 2 cm, find its perimeter.
A. [tex]$18 \, cm$[/tex]
B. [tex]$22 \, cm$[/tex]
C. [tex]$20 \, cm$[/tex]
D. [tex]$36 \, cm$[/tex]



Answer :

Alright, let's tackle each question one by one:

Question 6:

We are asked to find the interest on GH₵ 400.00 for 2 years at 10% simple interest per annum.

To solve this, we utilize the formula for Simple Interest:

[tex]\[ \text{Simple Interest (SI)} = P \times R \times T \][/tex]

where:
- [tex]\(P\)[/tex] is the principal amount (initial amount) which is GH₵ 400.00,
- [tex]\(R\)[/tex] is the rate of interest per annum which is 10%, and
- [tex]\(T\)[/tex] is the time in years which is 2 years.

Let's input the values into the formula:

1. The principal amount [tex]\(P\)[/tex] is GH₵ 400.00.
2. The annual interest rate [tex]\(R\)[/tex] is 10%, which we convert to a decimal form for the calculations (10% = 0.10).
3. The time period [tex]\(T\)[/tex] is 2 years.

Now, we calculate the simple interest:

[tex]\[ \text{Simple Interest} = 400.00 \times 0.10 \times 2 \][/tex]

Perform the multiplication:

[tex]\[ \text{Simple Interest} = 400.00 \times 0.10 = 40.00 \][/tex]
[tex]\[ \text{Simple Interest} = 40.00 \times 2 = 80.00 \][/tex]

Therefore, the interest on GH₵ 400.00 for 2 years at 10% simple interest per annum is GH₵ 80.00.

The correct answer is:
D. GH₵ 80.00