What is the solution set for 3x+1≥8 and 10x≤15
a. { x : 1 1/2 ≤ x ≤ 2 1/2 }
b. no solution
c. { x : 5 < x < 7 }
d. { x : x < 5 or x > 7 }

the answer is D

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: