Abdre tried to solve the equation 4(x+12)=16. Andre solved the problem incorrectly. Identify the step that Andre first makes his mistake. Step 1 4( x + 12)= 16 Step 2 4( x + 12) - 12 = 16 - 12 Step 3 4x = 4 Step 4 4x / 4 = 4 / 4 Step 5 X=1

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:

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you estimate that the angle of elevation to the top of the 86th floor (the observatory) is 82 .the total height of the building is another 123 meters above the 86th floor.

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