Its asking for the units being used so the answer is Inches
Let "x" represent the age of Brian.
Andrew is elder than Brian by 2 years, we can symbolize his age as "x+2"
Frank is twice as old as Andrew, we can symbolize his age as "2(x+2)"
Sarah has half the age of Brian's, we can symbolize her age as "x/2"
Frank ans Sarah's ages differ by 40 years, we can symbolize this as:
![2(x+2)-\frac{x}{2}=40](https://tex.z-dn.net/?f=2%28x%2B2%29-%5Cfrac%7Bx%7D%7B2%7D%3D40)
Solve the term is parenthesis
![\begin{gathered} 2x+4-\frac{1}{2}x=40 \\ 2x-\frac{1}{2}x+4=40 \\ \frac{3}{2}x=40-4 \\ \frac{3}{2}x=36 \\ x=24 \end{gathered}](https://tex.z-dn.net/?f=%5Cbegin%7Bgathered%7D%202x%2B4-%5Cfrac%7B1%7D%7B2%7Dx%3D40%20%5C%5C%202x-%5Cfrac%7B1%7D%7B2%7Dx%2B4%3D40%20%5C%5C%20%5Cfrac%7B3%7D%7B2%7Dx%3D40-4%20%5C%5C%20%5Cfrac%7B3%7D%7B2%7Dx%3D36%20%5C%5C%20x%3D24%20%5Cend%7Bgathered%7D)
x=24 years
Andrew's age is
![x+2=24+2=26](https://tex.z-dn.net/?f=x%2B2%3D24%2B2%3D26)
Andrew is 26 years old
40x5= 200
I'm not sure who created five times more projects than the other, but whoever did, created 200 projects.
Answer:
B. 9.6 %.
Step-by-step explanation:
A = P e^rt
His investment doubles so it comes to 3000 * 2 = $6000.
Substituting in the formula>
6000 = 3000e^7.2r ehere r is the interest rate.
e^7.2r = 2
Taking logs
7.2r = ln 2
r = ln2 / 7.2
r = 0.096
So the rate is 9.6%.