How do you know if a whole number is a perfect square? A whole number is a perfect square if it is divisible by 4.
B whole number is a perfect square if it is divisible by 2.
C whole number is a perfect square if its square root is an irrational number.
D whole number is a perfect square if its square root is a whole number.

1. 22

2. 1

3. 7

4. 18

step-by-step explanation

e2020 got it right

first, we define the variables:

x: number of years after 1950

f (x): amount of vinyl sold.

then, with the variables defined, we have:

68594 vinyl records were sold in 1958 > f (8) = 68594

91299 vinyl records were sold in 1961 > f (11) = 91299

38720 vinyl records were sold in 1952 > f (2) = 38720

161743 vinyl records were sold in 1967 > f (17) = 161743

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step-by-step explanation:

answer:

step-by-step explanation:

if i'm not wrong, i would say that the third angle has (72) because the three sides of all triangles have 180 degrees and if we subtract 180 - 62 - 40 = (72) / but i'm not sure about 40 yd.