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<h2>(a) 5,050 psi.</h2><h2>(b) 5,051.3 psi.</h2><h2>(c) 5,180 psi.</h2><h2>(d) 4,920 psi.</h2>Step-by-step explanation:
The given function is
Where represents the accelerated strength in psi, and
represents 28-day standard-cured strength in psi.
Part a is about finding the y-value for
Therefore, the expected value of 28-day strength when accelerated strength is 2,500, is 5,050 psi.
Part b is about the y-value for
Part c is about the y-value for
Part d is about the y-value for