Ashley is digging for rocks at a geological site. she has 140 meters of rope and 4 stakes to mark off a rectangular area. which set of dimensions will create a rectangle using all the rope ashley has with her?

ok consider a rectangle with two sets of equal sides

call one side of a set x

and one side of the other set y

we know she has 140 meters of rope so perimeter of the rectangle = 140

so 2x + 2y= 140

hence X = (140- 2y)/2

the dimensions have to satisfy the above equation

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: