For a normal distribution, what percentage of values lies within two standard deviations of the mean?

99.7%

97%

68%

95%

Sam went to her closet and had 1 red shirt, 1 blue shirt, and 1 orange shirt. She then found 1 blue pants, 1 green pants, and 1 black pants. She also had 1 black hat and 1 blue hat.

Which rational number lies between - 14/31 and - 17/33 A. - 989/3069 B. - 123/276 C. - 989/2046 D. - 4/7

Tim currently makes $13.26 an hr. plus gets paid 10 days of vacation. How many days/or hours would he have to work in order to be at $18000 at the end of the year?

Mr. Kashwell gave his glass 8 minutes to do their exit slips. Subaru's did 5 problems in that time. How many problems did Subaru's do per minute?

A car dealer value a car used as a trade in at $1. 120 the then offered it for sale for $ 1.400

A veterinary researcher takes an SRS of 60 horses presenting with colic. The average age of the 60 horses with colic is 12 years. The average age of horses seen at the veterinary clinic was determined to be 10 years.

Which ordered pair is the solution to y - x = 3 and 2x + y = 9?

Sally is interested in taking a job in a city which she's not familier with the cost of living. She is especially concerned about the cost of housing and is interested in the average cost of a three bedroom home.

A skating rink charges $0.75 to rent skates and $1.25 per hour to skate. How many hours did Penny skate if she was charged $4.50?

Simplify 1/3 12x - 6 A. - 2x-1 B.-2x-8 C.-x+4 D. 3x+10 E. 4x-2