I suspect 4/2 should actually be 4/3, since 4/2 = 2, while 4/3 would make V the volume of a sphere with radius r. But I'll stick with what's given:





In Mathematica, you can check this result via
D[4/2*Pi*r^3, r]
Answer:
i wouldsay b
Step-by-step explanation:
The greatest common factor is 2
This is because we start by taking the largest factor that goes into both coefficients. Since the first coefficient is 2, we have to try 2 and 1. Since 2 is larger and goes into 36 evenly, we use that.
Then we use the smallest number of each variable. There are 4 r's in both equations. So, that is the number that we take. There are 2 s's in the first term, so we take that number.
Answer:
1)
.
2)
years
Step-by-step explanation:
Let Hanna's sister be
years old.
Then Hanna will be
years old.
The sum of their ages will be
years.
The statement "no more than 18" means the sum of their ages is less than or equal to 18.
The required inequality is;
.
2)
The inequality we just found is
.
We simplify to get;
.
we divide both sides by
to get;
.
Therefore the oldest age Hannah's sister can be is
years
9/10 * 2/2 = 18/20
9/10 * 3/3 = 27/30