Suppose that 44% of all americans approve of the job the president is doing. the most recent gallup poll consisted of a random sample of 1,400 american adults. a. what is the mean of the sampling distribution? b. what is the standard deviation of the sampling distribution (don't forget to justify the use of the formula)? c. describe the normal approximation for this sampling distribution (don't forget to justify this) you can simply write as n (mean, standard deviation) d. what is the probability that the gallup poll will come up with a proportion within three percentage points of the true 44%

Hello i need some with trigonometric substitutions. [tex]\int\limits^a_b {x} \, dx[/tex]

Ahigh school has 3636 players on the football team. the summary of the players' weights is given in the box plot. approximately, what is the percentage of players weighing less than or equal to 225225 pounds?

Someone answer this asap rn for ! a discount store’s prices are 25% lower than department store prices. the function c(x) = 0.75x can be used to determine the cost c, in dollars, of an item, where x is the department store price, in dollars. if the item has not sold in one month, the discount store takes an additional 20% off the discounted price and an additional $5 off the total purchase. the function d(y) = 0.80y - 5 can be used to find d, the cost, in dollars, of an item that has not been sold for a month, where y is the discount store price, in dollars. create a function d(c(x)) that represents the final price of an item when a costumer buys an item that has been in the discount store for a month. d(c(x)) =