A. The term "units" refers to the measurements in the original question or problem. When looking at the question, the units we are measuring are dollars/feet.
B. In this case, the f'(x) means we are looking for the cost (in dollars) to drill the next foot down.
C. Since the cost increases the more feet we drill down, the sign of f'(x) is positive.
1. 16/9 simplified
2. 99/6= 33/2
3.4/9 simplified
4. 6/4= 3/2
5. 6/13 simplified
I meant verb ...... Stupid auto correct
Do a proportion
78/100= x/95
Cross multiply and divide
78 x 95= 7,410
7,410 divided by 100 is 74.1
Answer is 74.1
The answer is 1/4
If you'd like an explantation, I will add it.
Hope this helped =D
(I added how many 1/8 there were and how many 1/4 there were)
3/4 - 4/8
Simplify 4/8, which gives you 1/2
Then find the LCD (Least common denominator which is 4
then subtract
(I cant add a picture of how i did because my camera is blurry on my computer
