Which of the following is a geometric sequence? * 1 point
-1, -3, 9, 27, . . .
-1, 2, -4, 8, . . .
1, 4, 9, 16, . . .
1, 3, 5, 7, . . .

An automated water dispenser fills packets with one liter of water on average, with a standard deviation of 5 milliliter. the manual says that after a year of operation the dispenser should be tested to see if it needs recalibration. a year later a number of filled packets are set aside and measured separately. it is found that the average packet now contains about 0.995 liters. does the dispenser need calibration? explain your answer.

Define multiplicative inverse. give an example of a number and its multiplicative inverse.

Lucy is a dress maker. she sews \dfrac47 7 4 of a dress in \dfrac34 4 3 hour. lucy sews at a constant rate. at this rate, how many dresses does lucy sew in one hour? include fractions of dresses if applicable