Aquality control technician checked a sample of 30 bulbs. two of the bulbs were defective. if the sample was representative, find the number of bulbs expected to be defective in a case of 450.

a. 36
b. 45
c. 30
d. 24

Write the sentence as an equation. 6 fewer than the quantity 140 times j equals 104

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

Tim's phone service charges $26.39 plus an additional $0.21 for each text message sent per month. if tim's phone bill was $31.64, which equation could be used to find how many text messages, x, tim sent last month?