Answer:
To start, Australia is an island and lacks all the natural resources needed for an economy to run smoothly. Meaning, that the country/continent has to import much of its needs. additionally, the terrain of the continent is mostly dry, desolate, desert/tundra which isn’t very supportive of human life. This would mean that that part of the earth does not have resources. Again, this means that while Australia has a phenomenal working population, many of its needs have to be imported for the economy to function.
Explanation:
 
        
             
        
        
        
It is customary<span> to </span>say that a hypothesis has "not been rejected" rather than "accepted" an because we <span>cannot state that the null </span>hypothesis<span> is true, only that is </span>has not been rejected. Also, it<span> not possible to prove that a hypothesis is true; it is only possible to prove that it is not false</span>
        
             
        
        
        
True
Explanation:
A precast concrete slab can be taken directly from the manufacturing unit and after being treated can simply be placed on the construction site where it is desired.
<u>When the construction uses standardized measurements, the usage of precast concrete is preferred because it is faster and easier to work with.</u>
Most constructions are undertaken with pre-cast concrete because of this.
Field modification is necessary when there is no set rule on how the construction can go underway and there is scope for external factors to effect it. 
 
        
             
        
        
        
The way in which new scientific instruments improved the accuracy of observation is they made objects more precise.
<h3>What is a Scientific Instrument?</h3>
This refers to the use of tools for the purposes of scientific research and analysis to get answers about a particular phenomenon.
Hence, we can see that instruments like the microscope and telescope, brought things that were far away or too small into focus so that they could be easily observed and studied.
Read more about microscopes here:
brainly.com/question/15744335