could use help with these please Differentiate the function. y= (2x4 -x+1) (-x5+2) A building was bought for $100,000 and sold 18 years later for $460,000. What interest rate (compounded continuously) was eamed on the investment? To find the interest rate earned on this investment, use the formula for continuous compound interest, where A is the final amount, P is the initial amount, r is the interest rate, and t is the time period. What is the formula for continuous compound interest? Differentiate the function y = In x . In 11x. d Compute -f(g(x)), where f(x) = x" and g(x) = 9x - 2. Determine if the function f(x) is continuous and/or differentiable at x = 1? f( x ) = x +1 for - 1sx= 1 2x for 1