Answer:
21
Step-by-step explanation:
why do you use points when you could literally just search it up
The surface area of a sphere is given by

We deduce

So, in your case, the radius is

The volume of a sphere is given by

So, we have

#3.
in this case, all you need to do is to look at the intersecting point. each units represent 2, the coordinates of the intersection are (4,-1), so D is the choice.
#4. B is the choice. two lines either intersect once (one solution), never (parallel, no solution), or overwrap (merge, infinite solutions)
Answer:
1) Ben, 2)
, 3)
, 4) 
Step-by-step explanation:
1) Ben has a higher rate of memorization, since the coefficient of the second power is lesser than the one from Alice.
2) The number of words can be estimated by integrating the function:
Alice


Ben




3) The average amount of words per minute is:


4) The average amount of words per minute is:


Answer: 28 - 8
Step-by-step explanation:
Adding a negative number is the same as subtracting its absolute value (: