The following data represent the duration (in days) of pregnancies for a random sample of mothers.
277 291 295 280 268 278 291
277 282 279 296 285 269 293
267 281 286 269 264 299
Calculate the sample standard deviation of the data set. Round
your answer to the nearest tenths place.

Find the value of 1715⋅211.though these numbers aren't quite as nice as the ones from the example or the previous part, the procedure is the same, so this is really no more difficult. give the numerator followed by the denominator, separated by a comma.

Adepartment store purchases screen-printed t-shirts at a cost of $5 per shirt. they mark up the price 150% (making the selling price 250% of the store's purchase price) and put them on the sales floor. every month that a t-shirt doesn't sell, the store reduces the selling price by 25%.

Siri can type 90 words in 40 minutes about how many words would you expect her to type in 10 minutes at this rate