a sample of 100 pregnancies were found to take an average of 267 days. the population deviation is known to be 13 days. find a 90% confidence interval for the true population mean.

Converting 15/10 to a percentage

A pie was cut into 8 equal pieces. If Ruben ate 3/5 of the pie, how many did he eat

8.702 what value is the 2

Darius takes his family on an afternoon boat ride. Going through York Canal, he drives 5 miles in 15 minutes. Later on as he crosses Stover Lake, he drives 30 minutes at the same average speed.

Nslate the sentence into an equation. The sum of 6 times a number and 2 is 9.

Describe and correct the error in writing 39/40 as a percent 39/40 = 0.975 = 9.75/100=9.75%

If a figure is a square then it is a regular quadrilateral is this true or false

A Product What is the product of 4.01 x 10-5 and 2.56 x108?

Gina sold 5/8 of a mushroom pizza and 3/4 of an onion pizza to the same family. How much pizza in all did the family buy?

Find the area under the standard normal curve to the left of z = 0.49 and to the right of z = 2.05. Round your answer to four decimal places, if necessary.