The number of text messages, y (in billions), sent in the United States since 2005 can be
modeled using the equation y=18.8(3), where x is the number of years after 2005. In what
year were there approximately 4.6 trillion text messages sent?
A.2007
B.2008
C.2009
D.2010

take it another

they disappear if your absent from to long. i found out that the hard way.

step-by-step explanation:

brainliest lol i just need one more brainliest.

explanation:

infrared radiation has wavelength in the range between 700 nm and 1 mm. lets' convert these values into scientific notation, keeping in mind that:

let's start from the lower value, we have:

(we moved the dot two places to the left, so we increased the exponent by 2 units, from -9 to -7)

the higher value is:

so, the range of wavelength of infrared radiation is:

c

step-by-step explanation: easy math