Alica

Final averages are typically approximately normally distributed with a mean of 65 and a standard deviation of 8. Your professor says that the top 10% of the class will receive an A; the next 20%, a B; the next 41%, a C; the next 19%, a D; and the bottom 1...

In a normal distribution, what z-score value separates the highest 90% of the scores from the rest of the distribution? a)z = -1.28 b)z = 1.28 c)z = -0.13 d)z = 0.13

For the past 20 years, the high temperature on April 15th has averaged µ = 62 degrees with a standard deviation of σ = 4. Last year, the high temperature was 72 degrees. Based on this information, last year's temperature on April 15th was the following. a...

The NCAA men's basketball season starts with 327 college teams all dreaming of making it to "the big dance" and attaining the National Championship. Sixty-four teams are selected for the tournament, and only one wins it all. (Assume that every team has an...

If you roll a die 38 times and 12 of the rolls result in a "5," what empirical probability was observed for the event "5"?

A 1.60-g bullet, moving at 542 m/s, strikes a 0.249-kg piece of wood at rest on a frictionless table. The bullet sticks in the wood, and the combined mass moves slowly down the table. (a) Find the speed of the combination after the collision. m/s (b) Find...

A 1280-kg car starts from rest and accelerates to 80 km/h in 23.0 s. Friction exerts an average force of 449 N on the car during this time. (a) What is the net work done on the car? J (b) How far does the car move during its acceleration? m (c) What is th...

Calculate the morality of a solution made by mixing 250ml of 0.75M H2SO4 with 400ml of 2.5MH2SO4

the answer is a women

both of these answers a- 280J and b-46.4m/s are wrong?

I have never used these equations before, can you explain/ show me

these are all wrong :(