Aparticle moves along a straight line with equation of motion s = f(t), where s is measured in meters and t in seconds. find the velocity and the speed when t = 3. f(t) = 10 + 20 / (t + 1).

Describe in detail how you would construct a 95% confidence interval for a set of 30 data points whose mean is 20 and population standard deviation is 3. be sure to show that you know the formula and how to plug into it. also, clearly state the margin of error.

If f(x) = 4 - x2 and g(x) = 6x, which expression is equivalent to (g-f)(3)? 06-3-(4 + 3)2 06-3-(4-33 6(3) - 4 +32 6(3) -4 -32

What are two numbers that have a sum of 15?