2x+5 = 170

Two Step Equation

Describe the 2 algebraic methods you can use to find the zeros of the function f(t)=-16t^2+400.

What is the best approximation for the area of a circle with a radius of 4 m ? use 3.14 to approximate pi

Ur environment is very sensitive to the amount of ozone in the upper atmosphere. the level of ozone normally found is 4.04.0 parts/million (ppm). a researcher believes that the current ozone level is not at a normal level. the mean of 2525 samples is 4.44.4 ppm with a standard deviation of 0.80.8. assume the population is normally distributed. a level of significance of 0.020.02 will be used. make the decision to reject or fail to reject the null hypothesis. answer tables