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I'm in 10th grade ​

How many days was the temperature above 90 degrees?

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)

Consider the following equation. 1/2x^3+x-7=-3sqrtx-1 approximate the solution to the equation using three iterations of successive approximation. use the graph below as a starting point. a. b. c. d.