Population 1 is Normally distributed with a mean of 40 and a standard deviation of 4, and population 2 is Normally distributed with a mean of 25
and a standard deviation of 7. Suppose we select independent SRSs of n1
= 100 and n2 = 85 from population 1 and 2 respectively. Which of the
following are the values of the mean and The standard deviation of the
sampling distribution of x1 - x2?*

White shapes and black shapes are used in a game. some of the shapes are circles. while the rest are squares. the ratio of the number of white shapes to the number of black shapes is 5: 11. the ratio of the number of white cicrles to the number of white squares is 3: 7. the ratio of the number of black circles to the number of black squres is 3: 8. work out what fraction of all the shapes are circles.

Describe how to determine the average rate of change between x = 4 and x = 6 for the function f(x) = 2x^3 + 4. include the average rate of change in your answer.

When you find the area of a triangle do you use in. or in2