given the arithmetic sequence - 4, - 1, 2,, 98 calculate the sum of all the terms in the sequence that are divisible by 2​

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.

Which ratios are equivalent to 10: 16? check all that apply. 30 to 48 25: 35 8: 32 5 to 15

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.