I think B but I might be ! wrong !
<span>The approximate lifetime of a star like our Sun is in the range of 10.3 billion years. At a current age of 4.6 billion years, this will leave (10.3 - 4.6) or approximately 5.7 billion years before the supply of hydrogen fuel (and thereby, helium) will run out.</span>
The length of an arc rounded to the nearest hundredth is 4.75units
<h3>How to calculate the length of an arc?</h3>
The formula for calculating the length of an arc is expressed as:
L = rtheta
where
r is the radius = AB = 4 units
theta is the central angle = <ABC = 68 degrees
Substitute
L = 4(68π/180)
L = 4.75units
Hence the length of an arc rounded to the nearest hundredth is 4.75units
Learn more on length of an arc here: brainly.com/question/2005046
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A magnetic survey can be used to explore for minerals that cannot be seen because the deposit is hidden underground.
<h3>What is Magnetic Survey?</h3>
Magnetic surveying is one of the methods used in archaeological geophysics.
This involves the measurement of and recording of Spartial variations in the earth's magnetic field.
Magnetic survey is also in search for mineral-bearing ore bodies or even oil-bearing sedimentary structures.
Learn more about minerals at brainly.com/question/538256
