12. The original price of a stove was $480. Its price has since increased by $30. The stove is currently on sale for 10% off. What is the sale price for the stove?

A $459
B. $462
C. $472
D. $500

true

step-by-step explanation:

linear pair postulates

x² + 3x + 7 = 0       [ax² + bx + c]

a = 1

b = 3

c = 7

quadratic formula:

    (+/- is this ±)

plug in the numbers into the variables

your answer is a

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: