A rectangular garden has a length of 5ft and a width of 8 ft. The length is increased by 2 feet. By how many square feet does the area increase?
Step 1. Area of a rectangle is given as A=length * width
Step 2. Then, A1=5*8=40 square feet of original area of rectangular garden.
Step 3. Then, A2=(5+2)*8=56 square feet since the length is increased by 2. feet.
Step 4. Difference = A2 - A1 = 56 - 40 = 16 square feet.
Step 5. ANSWER: The area increased by 16 square feet.
Well
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4 x 5 = 20
and
5 x 5 = 25
I'm sure a calculator could help you out with this, But if you don't have access to a calculator I'll show you how to multiply. It's just like adding, Let's use 6 x 7 for example. Take the first number ( Which is 6 in this case ) and look at the second number ( Which would be 7 ) The second number represents how many times you would add the first number together. So:
6 + 6 + 6 + 6 + 6 + 6 + 6 = 42 ( We add 6 together 7 times )
So
6 x 7 = 42
There are faster methods but this is probably the best way to start out.
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The amount you will repay can be solved by:
Amount to be repaid = ( $ 1, 431 borrowed) ( $ 0.31 per day
/ $ 500 borrowed) 151 days
Amount to be repaid = $ 133.97
The annual interest rate is:
1431 + 133.97 = 1431( 1 + i)^ 151(1/360)
Solve for i
i = 0.2378 or 23.78 % per year
Simplified answer would be 2 - 9i.
