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Does the equation #y=5/2x# represent a direct variation and if so, identify the constant of variation?

The specific heat of iron is 0.46 J/gC. How many joules will it take to make the temperature of a 150 g bar go up from 25 C to 60 C?

How do you find a power series representation for #f(x) = ln(x^2+1)# and what is the radius of convergence?

Question #be320

Question #1211a

Find the integral #intsec(x)/(sec(x)+tan(x))dx#?

Question #75a4b

How do you find the Taylor's formula for #f(x)=sinx# for #xpi#?

Question #8f91f

Question #8d661

A firefighter at the scene of a fire is holding a heavy hose out of which water is gushing. To keep her balance, she often has to lean. Which way does she lean, forward or backward, and why?