square past has a vertex a at (-4,2). past is reflected about the x-axis. it is then reflected again over the line y=-x. what is the coordinate of vertex a

answer: it's d

step-by-step explanation:

ratio is 2 : 9

the answer is three

13.5 : 3

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:

- (2, -7)

- lines r and s and lines t and u must be parallel