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The function a represents the cost of manufacturing product a, in hundreds of dollars, and the function b represents the cost of manufacturing product b, in hundreds of dollars. a(t) = 5t + 2 b(t) = 7t - 2t +4 find the expression that describes the total cost of manufacturing both products, a(t) + b(t). a. 7t^2 - 7t + 2 b. 7t^2 + 3 +6 c. 7t^2 + 7t - 6 d. 7t^2 - 3t + 6

In a timed typing test lara typed 63 words per minute.estimate the number of words she should be able to type in half in hour show your work

Pls math have no ideamultiply and simppify. 2x^2y^3z^2 • 4xy^4x^2