Hello there..
<span>Which of the following statements is TRUE?
</span>D. Light waves are electromagnetic waves and sound waves are mechanical waves.
External = R
Internal = r
Volume of hemisperical = 2/3 π(R³-r³)
V= 2/3 π(9.1³ - 8.4³)
V= 336.9 cm³
This behavior helps Betty in <u>intellectual </u>development.
Answer is A)mixtures of minerals