2) Calcule o produto: a) (+2) . (-7) =
b) 13 . 20 =
c) 13 . (-2) =
d) 6 . (-1) =
e) 8 . (+1) =

f) 7 . (-6) =
g) 5 . (-10) =
h) (-8) . 2 =
i) (-1) . 4 =
j) (-16) . 0 =

Sarah used her calculator to find sin 125 degrees. she wrote down sin sin125 degrees.57. how could sarah recognize that her answer is incorrect?

2people are trying different phones to see which one has the better talk time. chatlong has an average of 18 hours with a standard deviation of 2 hours and talk-a-lot has an average of 20 hours with a standard deviation of 3. the two people who tested their phones both got 20 hours of use on their phones. for the z-scores i got 1 for the chatlong company and 0 for talk-a-lot. what is the percentile for each z-score?

Val and tony get paid per project. val is paid a project fee of $44 plus $12 per hour. tony is paid a project fee of $35 plus $15 per hour. write an expression to represent how much a company will pay to hire both to work the same number of hours on a project.