Ms. Rodriguez is comparing data about the number of leaf samples tested by three scientists in each of two laboratories. The tables show the number of leaf samples tested and the time spent testing.

Laboratory A Laboratory B
Scientist Number of Leaf
Samples Tested Time Spent
(minutes) Scientist Number of Leaf
Samples Tested Time Spent
(minutes)
Steve 90 30 Mary 140 35
Jesmy 180 45 Brian 160 40
Buck 210 60 Kate 220 55

Which laboratory shows a proportional relationship between the number of leaf samples tested and the time spent testing

Evaluate the expression for the given value of the variable 2×(c2-5) for c=4

Aprofessional hockey team has noticed that, over the past several seasons, as the number of wins increases, the total number of hot dogs sold at the concession stands increases. the hockey team concludes that winning makes people crave hot dogs. what is wrong with the hockey team's conclusion? a) it does not take into account the attendance during each season. b) it does not take into account the number of hamburgers sold during each season. c) it does not take into account the number of concession stands in the hockey arena. d) it does not take into account the number of seasons the hockey team has been in existence.

Jane’s favorite fruit punch consists of pear, pineapple, and plum juices in the ratio 5: 2: 3. how many cups of pear juice should she use to make 20 cups of punch?