Problem #3 Evaluate Cosine with calculator
(Modeling) Measuring Speed by Radar Any offset
between a stationary radar gun and a moving target
creates a "cosine effect" that reduces the radar read-
ing by the cosine of the angle between the gun and the
vehicle. That is, the radar speed reading is the product
of the actual speed and the cosine of the angle. (Source:
Fischetti, M., “Working knowledge," Scientific American.)
Find the radar readings, to the nearest unit, for
Auto A and Auto B shown in the figure.
Radar gun
Auto A
10° angle
Actual speed: 70 mph
Auto B
20 angle
Actual speed: 70 mph

He mass of a single atom of carbon can be found by dividing the atomic mass (12.01 g) by 6.022 x 10^23. which is the mass of a single carbon atom, correctly written in scientific notation with the correct number of significant figures?

Karen will divide her garden into equal parts. she will plant corn in 8/12 of the garden. what is the lowest number of parts she can divide her garden into?

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?