A quality control engineer tested a sample of 130 batteries from a batch of 6500 batteries. The engineer found 3 defective batteries in the sample. About how
many defective batteries can the engineer expect in the batch?

Abacteria population is tripling every hour. by what factor does the population change in 1/2 hour? select all that apply

Asurvey of 45 teens found that they spent an average of 25.6 hours per week in front of a screen (television, computer, tablet, phone, based on the survey’s sample mean, which value could be the population mean? 2.3 hours 27.4 hours 75.3 hours 41.5 hours

Serena is making an experiment. for that, she needs 20 grams of a 52% solution of salt. she has two large bottles of salt water: one with 40% and the other with 70% of salt in them. how much of each must she use to make the solution she needs? i am in need of