A shipment of beach balls with a mean diameter of 28 cm and a standard deviation of 1.3 cm is normally distributed. By how many standard deviations does a beach ball with a diameter of 31.9 cm differ from the mean?

A.) 1

B.) 1.3

C.) 2

D.) 3

Solve the problem by writing a variation model. The distance that a car can go varies directly as the number of gallons of gasoline it consumes. If a car can go 276 miles on 12 gallons of gasoline, how far can it go on a full tank of 19 gallons?

Study the equation:4^x=6 Show work.

A motor car advertised for $6990 is sold under the following terms: 40% deposit and the balance repaid over 5 years at $32 per week. A. What is the deposit required? B. Find the amount paid as interest?

Trey had answered 15 E-mails. This is 20% of E-mails he must answered. How many E-mails does he need to answer?

Who is faster The Flash or Quicksilver? I want a source to back up your answer

Is the movie is 28 minutes and 58 seconds and we have watched 13 minutes and 44 second how much long do we have before we finish the movie

Convert the following Fahrenheit degrees to Celsius. a. 104° F b. 41° F c. 131° F d. 95° F

Rufus collected 100 pounds of aluminum cans to recycle. He plans to collect an additional 25 pounds each week. Right and crafty equation for the total pounds P, of aluminum cans after w weeks. What does the slope represent.

A recipe that serves 2 people calls for 1,600 milligrams of baking soda. You want to make enough for 10 people. How many grams of baking soda will you need?

Mrs Patterson class room has sixteen empty chairs all the chairs are occupied when every student is present if 2/5 of the student are absent how many make up her entire class