During the period 1998-2002. the number A(in millions) of books for adults and t

Question

During the period 1998-2002. the number A(in millions) of books for adults and the number J(in millions) of books juveniles sold can be modeled by A = 9.5t^3 -58t^2 + 66t + 500 and J = -15t^2 + 64t + 360, where t is the number of years since 1998. Write an equation that gives the total number (in millions) of books for adults and for juveniles sold as a function of the number of years since 1998. How many books were sold in total in 1999? Include units. Architecture application. When the maximum deflections of two similar cantilever beams bearing distributed loads are compared, the difference in deflection is given by d = w/8EI(I_1 - I_2)(I_1 + I_2)(I_1^2 + I_2^2). simplify this formula by multiplying the three factors containing I_1

Explanation / Answer

d = (w/8EI)*(l1 - l2)*(l1 + l2)*(l12 + l22)

Now we know that

(a - b)*(a + b) = a^2 - b^2

using this

d = (w/8EI)*(l12 - l22)*(l12 + l22)

Again using same formula

d = (w/8EI)*(l14 - l24)

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