Calculate work of push-up if she weighs 450 N and elevates her shoulders 0.5 meters from the ground.

225 joules

Step-by-step explanation: the work formula is force times distance and the force is 450 and the distance is .5 so the answear is 450J

225J

Step-by-step explanation:

work=force×distance

450×0.5

=225

hope this helps

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$53.50

step-by-step explanation:

you have to subtract the amount of money chuck earned ($72.50) by the cost of the gas for the mower ($11.25) and the new string for the trimmer he bought ($7.75).

72.50-11.25=61.25

and then subtract $61.25 by the second thing he bought (the new string for the trimmer)

61.25-7.75=53.5

so in total it's $53.50 (53 dollars and 50 cents)

not only in mathematics, scientific proof also are required in the other field of science. also maths proofs are of particular structure, containing steps and logics. so proving is like doing science, it is science. that's why it is important to prove. 

an inaccurate proof leads to errors, or stating results that are not accurate.  which wil mess the probelm up you dont want this