Answer:
5040
Step-by-step explanation:
The given series is :
24 + 48 + 72 + 96 +...+ 480
The first term, a= 24
Common difference, d = 24
The last term, 
Let there are n terms in the AP.
So,

There are 20 terms in the series. The sum of 20 terms is :

So, the sum of the given arithmetic series is equal to 5040.
Answer:
Sorry about that guy
These are the answers still working January 9th of 2019
1.B
2.C
3.B
4.A
Late response but this will help future users at least :P
Step-by-step explanation:
Answer:
118. The radius is 118 feet.
Step-by-step explanation:
(-1, 5) because if you plug in -1 to both equations, you should get 5 from both equations. They also cross at that point, making that the solution.
Answer:
d(t) = 60t
Step-by-step explanation:
When d = 0, t = 0 as well, so the y-intercept in 0. The slope of the line would be 60.
Hope this helps!