Consider the series 3 + 5 + 7 + 9 + ... + 2n + 1. Write Sk and Sk + 1. a. Sk k(2k); Sk + 1 (k + 1)(k + 2)
b. Sk k(k + 2); Sk + 1 (k + 1)(k + 2)
c. Sk k(2k); Sk + 1 (k + 1)(k + 3)
d. Sk k(k + 2); Sk + 1 (k + 1)(k + 3)

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.

The table below shows the height of a ball  x  seconds after being kicked.  what values, rounded to the nearest whole number, complete the quadratic regression equation that models the data? f(x)  =  x2  +  x  +  0based on the regression equation and rounded to the nearest whole number, what is the estimated height after 0.25 seconds?   feet

Use multiples to write two fractions equivalent to 7/9. 14/18, 8/10 6/8, 21/27 10/12, 28/36 14/18, 21/27