9514 1404 393
Answer:
100
Step-by-step explanation:
The ratio of the numbers for the two years is ...
(10^12)/(10^10) = 10^(12-10) = 10^2 = 100
In 2010 there were 100 times as many text messages as in 2005.
Answer:
D
Step-by-step explanation:
Exponential equation takes the form
where
a is the initial value ( a ≠ 0), and
b is the base ( b ≠ 1)
The equation given can be written as
. Thus, it is an exponential equation.
So a = 1 and b = 3.1
Thus we can say that the initial value = 1 and the base is 3.3
Answer:
You should recruit a total of 525 subjects for the whole study.
Step-by-step explanation:
The question states that you want 175 subjects per group for 3 groups. This indicates that we need to either multiply 175 times 3, or we can add 175 three times to get the total number of subjects we would need to recruit. Group 1 should have 175, Group 2 should have 175 and Group 3 should have 175. Whether we multiply 175 x 3 or add 175+175+175, we get a final anser of 525.
Answer:
Step-by-step explanation:
0.005
Answer:
Step-by-step explanation:
y = arctan(x+pi/2) use that tan y = x is y= arctan x
tan y = x+pi/2; change x with y and find y
tan x= y +pi/2; subtract pi/2 from both sides
-pi/2 + tan x = y
y= tan x -(pi/2) is the inverse function
you can also write it as
y = 1/2(2 tan x -pi)