A librarian orders 48 fiction and nonfiction books for the school library. A fiction book costs $15 and a nonfiction book costs $20. The total cost of the order was $900.
How many nonfiction books did the librarian order? Show your work.

q1 a person or thing situated away or detached from the main body or system. a cluster is a a mash of many things.

q2 do

step-by-step explanation:

18.75 gallons

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: