Yussuf is 20m away from a tree, he observes. that the angle of elevation of a bird on the
tree is 58. He is 1-7n tall-How high is the tree?
using a seale or Icm represent 7m​

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:

the answer would be  

a.

3: 1

step-by-step explanation: