Robin donated bags of grain that each weighed 403 pounds to the local food shelf. if the total weight of the grain was 160 pounds, how many bags of grain did robin donate?

the answer should be 4

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: