Answer:
Prospective study
Step-by-step explanation:
Also known as a cohort study, the type of study that follows a certain group of individuals over time to reach conclusions about the data gathered at a future date is called a prospective study. Since the aim of this study is to see who develops cancer in the future, this is a clear example of a prospective study.
K, so am assuming of th next day
from 7pm to 12 midnight is 5 hours
from 12 midnight so 3am is 3 hours
3+5=8
8 hours total
checked double the amoutn last time
he spent 16 hours last time?
use photomath for that that's way easier
Answer:
x = 3
Step-by-step explanation:
Δ BDE and Δ BAC are similar triangles, thus the ratio of corresponding sides are equal, that is
= 
, substitute values
= 
( cross- multiply )
4(3x + 5) = 7(x + 5) ← distribute parenthesis on both sides )
12x + 20 = 7x + 35 ( subtract 7x from both sides )
5x + 20 = 35 ( subtract 20 from both sides )
5x = 15 ( divide both sides by 5 )
x = 3
Answer:
A
Step-by-step explanation:
Just put x = 80 and y = 210 into the equation...
or put x = 40, y = 90.
A:
210 - 90 = 3(80-40)
120 = 120√
B:
210 + 90 = 3(80+40)
300 = 360×
C:
210 - 90 = 2.6(80-40)
120 = 104×
D:
210 + 90 = 2.6(80+40)
300 = 312×
