In 2005, 10^10 text messages were sent in the United States. In 2010, the number of annual text messages had risen to 10^12
The number of text messages for 2010 was how many times the
number of text messages for 2005?

9514 1404 393

  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.

company a

step-by-step explanation:

using the linear regression models , it is found that company a   pays about $14 more. but using the same regression (linear) company b pays about $10 more.

so company a pays more than b

constant of proportionality = 3 and the equation is c = 3p.

step-by-step explanation:

c = kp   where c = amount of caffeine in mg., p = oz of pepsi and k is the constant of proportionality.

substituting the values given:

24 = 8k

k = 3.

the same value of k will be obtained if we substitute the other given values.