No Links!! A vinyl record has a circumference of 78.5 cm. What is its area? Use 3.14 for pi and round to the nearest square cm. please dont just give me 3.14 This is 40% of my grade and i'd really appreciate if someone could help me.

Step-by-step explanation:

we are given the circumstances of a vinyl record

we want to figure out the area

in order to do so we should figure out redious first

recall that,

given that, C=78.5

thus substitute:

divide both sides by 2π:

we have figured out r now we'll figure out the area

remember that,

substitute the value of r

by using calculator we acquire

ad = ae + ed = y + 7

similar triangles therefor

ac/ab = ad/ae

6/4 = (y + 7) / y

cross multiply

6y = 4(y + 7)

6y = 4y + 28

2y = 28

y = 14

step-by-step explanation: