Question 17 of 32 If the vertex of a parabola is (2, -9) and another point on the curve is (5, -18),
what is the coefficient of the squared expression in the parabola's equation?
O A. -5
ОB. 5
O C. -1
O D. 1

Step-by-step explanation:

Since you didn’t specify the type of parabola, I’ll assume it is vertical.

The vertex-form equation of the parabola is

y = a(x-2)² - 9

(5,-18) is a point on the parabola.

-18 = a(5-2)² - 9

-18 = a⋅3² - 9

a = -1

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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: