1. Dana has driven her car 95,598 miles. She estimates she can drive the car another 5000 miles before the mileage reaches 100,000 miles. Use the rules for estimating differences to explain if Dana is correct. Write About It 2. The estimated difference between 432,987 and a number, x, is 100,000. What is the greatest possible value of x? Explain how you got your answer.

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

answer: on graphs, the open and closed circles, or vertical asymptotes drawn as dashed lines us identify discontinuities.

as before, graphs and tables allow us to estimate at best.

when working with formulas, getting zero in the denominator indicates a point of discontinuity.

when working with piecewise-defined functions, check for discontinuities at the transition points where one piece ends and the next begins.

step-by-step explanation: