The formula is
A=p (1+r)^t
A=20×(1+0.5)^(12)
A=2,594.9 round your answer to get
A=2595
<span>use formula^: a²-b²= (a-b)(a+b)
x²-1=0</span>
x²-1²=0
(x-1)(x+1)=0
x-1=0⇒ x₁=-1
x+1=0 ⇒x₂=1
Answer: x=+-1
4.2.
If the 2 inch side was scaled to 10.5 inches the 5 inch side would be scaled by 10.5/2 = 5.25, so would be 25.125 inches which is too big.
So the 10.5 inches is the 5 inch side on the original, and so it 10.5/5 = 2.1 times bigger.
Therefore the smaller side would be 2*2.1/= 4.2 inches.
