4Y +3 equals 19 What does it equal

y=4

Step-by-step explanation:

4y+3=19

Minus 3 from +3 and 19

You get:

4y=16

Divide both 4y and 16 by 4

Which leaves you with y=4

12m

step-by-step explanation:

square root means have of a number so have of 3 is 1.5 then multiply it by 8 and you get your answer!

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: