This October it rained one inch the entire month. This is ¼ of the total rainfall in October last year. How much did it rain last October

4 inches

Step-by-step explanation:

Find 1/4 (or 25%) of 1 inch:

100 * 1 / 25 = 4

8+10

step-by-step explanation:

you multiply 4 by 2 and 5 by 2

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: