An athletic field is a 100 yd-by-40 yd rectangle with a semicircle at each of the short sides. A running track 10 yards wide surrounds the field. (figure not drawn to scale)
Find the perimeter of the outside of the running track to the nearest yard.

A.263
B.280
C.388
D.577

You are making a battery for a science project. you have copper wire for your first electrode. you need to choose a conductor, a second electrode, and a device to plug into your battery. you have already chosen a lemon conductor. complete each statement below about the options that include a lemon conductor.

Aplane flies around trip to philadelphia it flies to philadelphia at 220 miles per hour and back home with a tailwind at 280 miles per hour if the total trip takes 6.5 hours how many miles does the plane fly round trip

Can someone me and explain..will award brainlest!