D. Not all mixtures are heterogeneous
Answer:it have traveled a total of 315 miles
Explanation: 90 times three because 90 mph times 3 hours=270miles+ the 45 miles from the 30 min times 90 mph=45+ 270=315.
Answer:
The structures in the cell work together to perform its life functions
Explanation:
MgH2 + 2 H2O → Mg(OH)2 + 2 H2
