Answer:
D 3500
Step-by-step explanation:
This question is asking for the sum of all the terms in an arithmetic series.
So using the formula : Sn = n/2 (a+l) , where Sn is the sum of n terms, a is first term, and l is last term, we try to find Sn, with n being 25, a being 20, and an which is a25 or the twenty fifth term being 260, also being the last term.
Hence we can produce the formula for Sn which is Sn=25/2 (20+260)
Sn=25/2 (280)
=3500
Answer:
My guess is 9,12 ,18
Step-by-step explanation:
The whole thing is a right angle so x+67.4=90 solve for x and get 22.6 degrees
I don't know for certain, but it looks like each

is supposed to be the representative value of

over each subinterval
![[x_{i-1},x_i]](https://tex.z-dn.net/?f=%5Bx_%7Bi-1%7D%2Cx_i%5D)
, so that the Riemann sum is given by

where

The sum is then


Compare to the exact value of the corresponding definite integral,
The total amount of people surveyed is 50 people. 50 x30%= 15 or 50 x .3 = 15
The colors that add to 15 total people is red and purple.