A department store buys 400 shirts at a cost of $9,600 and sells them at a selling price of $30 each. Find the percent markup.

the answer is b.)

< 1=< 2

what level of math? also i don't need to be paid if i can you.

x=0

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: