A scientist recorded the amount of substance Z present in an ongoing chemical reaction. This table gives the amount of substance Z over the first 15 minutes. The data can be modeled using an exponential function. Time (min) 3 6 9 12 15
Substance Z (g) 6.2 3.84 2.38 1.48 0.92

Based on the data, which measurement is closest to the amount of substance Z that will be present after 30 minutes?

0 g
0.08 g
0.14 g
0.46 g

The school track has eight lanes. each lane is 1.25 meters wide. the arc at each end of the track is 180. the distance of the home straight and the radii for the arcs in the 1st 4 lanes are given. s=85m r1=36.5m r2=37.75m r3=39m r4=40.25m part one: find the radii of lanes 5 through 8 of the track. show your work. part two: if max ran around lane one, how far did he run? show your work and explain your solution. part three: max wants to run a total of three laps around the track, choose two additional lanes (2-8) for him to run and find the distance around those two lanes. show your work and round to the hundredths. part 4: based on your lane choices in part three, what was the total distance max ran in the three laps around the track?

Ms. green tells you that a right triangle has a hypotenuse if 13 and a leg of 5. she ask you to find the other leg of the triangle. what is you're answer?

Aresearch study is done to find the average age of all u.s. factory workers. the researchers asked every factory worker in ohio what their birth year is. this research is an example of a census survey convenience sample simple random sample