The piecewise function describes a newspaper’s classified ad rates. y = {25 when x≤4
25 + 5 (x − 4) when x > 4

a) Interpret this piecewise function (describe in words what it means) (2 points)

Find the cost of a 3 line ad (2 points)

Find the difference in cost between a one and four line ad (2 points)

Find the cost of a seven line ad (2 points)

i think u have 12 apples sorry again i don't really know if it correct i'm just tryna hrlp people out.

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: