Late
(8)
amelia wanted to redeem a voucher. she had only of the total number
of points needed. after she earned another 50 points, she still needed
o of the total number of points. how many points did amelia need to
redeem the voucher?

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:

15.36 per mile

but forgot to round

i am pretty sure