.The decimal expansion of 2/5 is * 0.4 and it terminates
0.4 and it repeats
2.5 and it terminates
2.5 and it repeats

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:

d 600 because 15*10*2=300

300+300=600

step-by-step explanation:

perimeter of the base times height

step-by-step explanation: