Step-by-step explanation:
![\dfrac{a}{b}\cdot(-1)=-\dfrac{a}{b}](https://tex.z-dn.net/?f=%5Cdfrac%7Ba%7D%7Bb%7D%5Ccdot%28-1%29%3D-%5Cdfrac%7Ba%7D%7Bb%7D)
On the number line, fractions a/b and -a/b lie on the opposite sides of the number 0, at the same distance (look at the picture).
Answer:
Electromagnetic waves have crests and troughs similar to those of ocean waves. The distance between crests is the wavelength. The shortest wavelengths are just fractions of the size of an atom, while the longest wavelengths scientists currently study can be larger than the diameter of our planet!
Step-by-step explanation:
Answer:
75kg
Step-by-step explanation:
Decrease =25÷100×100kg
= 0.25×100kg
= 25kg
Decrease 100kg by 25%=100kg-25kg
= 75kg
Answer:
12
Step-by-step explanation:
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