Of 320 consumers polled, some purchase blu-ray movies, some only purchase movies on dvd, and some do both. if 300 people polled purchase blu-ray discs and 280 purchase dvds and blu-ray discs, how many people only buy dvds?a. 300 b. 20 c. 280 d. 40

395.84

step-by-step explanation:

2πrh+2πr²

2 (pie)(radius)(height)+2(pie)(radius)^2

8496 cars

step-by-step explanation:

umumumumum

im not sure

δabc ≅ δdcb by sas because

db ≅ ac . . given (side)

bc ≅ bc . . reflexive property (side)

∠dbc ≅ ∠ acb . . alternate interior angles where transversal bc crosses parallel lines bd and ac (included angle)