Tyler wants to buy a jump rope that cost $5, a board game that cost $12, and a playground ball that cost $9. Ha has saved $8 from his allowance , and his uncle gave him $5. How much more money does Tyler need to buy the jump rope, the game, and the ball?

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.

You were told that the amount of time lapsed between consecutive trades on the new york stock exchange followed a normal distribution with a mean of 15 seconds. you were also told that the probability that the time lapsed between two consecutive trades to fall between 16 to 17 seconds was 13%. the probability that the time lapsed between two consecutive trades would fall below 13 seconds was 7%. what is the probability that the time lapsed between two consecutive trades will be between 14 and 15 seconds?

Identify the number 127 as a rational or irrational. explain