9x^2-y^2/21x+7y in expanded form

1/800 is the right answer

15 batches are the most you can make

step-by-step explanation:

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:

just took the test and my answers down below!

step-by-step explanation:

check the pic :