Answer:
He has the side lengths in the wrong place in the cosine ratio. (1st Answer on Edgen)
Step-by-step explanation:
You would first divide 28 by 7.
28 / 7 = 4.
Now multiply 4 by 5.
4 X 5 = 20.
Therefore, Leon read 20 pages.
Hi There!
Change all the fractions to decimal you do that by dividing numerator by the denominator. Remember

as a decimal is 0.5
A=

= 0.43
B=

= 0.60
C=

= 0.8
D=

= 0.42
E=

= 0.6
Based, on the data above B,C,E are greater than

because they all have decimals greater than 0.5, B= 0.6, C= 0.8, E=0.6
So,

are all greater than
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Hope This Helps :)