The cost of building a new library is 0.85 of the cost of remodeling the old library. What is the cost as a percent and as a fraction ? Explain how you get your answer.

85% = .85 x 100 to get percentage. Fraction is 85/100 and since both divisible by 5 you can get 17/20(divide both top and bottom numbers by 5 to get 17/20. Hope this helps.

Step-by-step explanation:

(sin 42)/31. = sinx)/37

sinx = 37 (sin42)/31

= 37× 0.66/31 = 0.787

x= 51.9

other angle opposite to y = 180-51.9-42

= 180- 93.9 =86.1

so

sin42)/31 = sin 86.1)/y

0.021 = 0.997 /y

y= 0.997/0.021 =47.47