A customer's total cell phone bill this month is $50.50. The company charges a monthly fee of $18 plus 5 cents for each call. Use n to represent the number of calls.

the correct answer is d

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i need points

step-by-step explanation:

sorry bubs

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: