Answer:
A. A reflection over the x-axis and a vertical stretch.
Step-by-step explanation:
Let
, to obtain
, we need to use the following two operations:
(i) Vertical stretch
, 
(ii) Reflection over the x-axis

Let prove both transformations in
:
Step 1 - Vertical stretch (
)

Step 2 - Reflection over the x-axis

Hence, correct answer is A.
Answer: ##########################
Step-by-step explanation: YW
100% = 1.0
2.5% = 0.025
So now we know the decimal that corresponds to 2.5%, so all we have to do is multiply the price of the boat by this value in order to find the commission earned:
18 500 x 0.025 = $462.50
It would be 10.5 because you just split the 21 since its two halfs