Iam desperate 20 ! 2. consider the quadratic equation 2x^2 + 7x – 4 = 0. a. what is the value of the discriminant? explain. b. how many solutions does the quadratic equation have and are those solutions rational, irrational, or nonreal? explain. c. if the quadratic equation has real solutions, what are the solutions? explain. estimate irrational solutions to the nearest tenth.

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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: