Brenda is making a dessert that takes 3.5 hours to prepare. if she wants to be finished by 1: 15, at what time should she start? ?

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:

answer: 12x^2+6x

step-by-step explanation:

6x does not equal 24x. hope it works!