Which of the following is true about the number 15? a it is a multiple of 5 and a factor of 25. b it is divisible by 3 and a factor of 45. c it is divisible by 6 and a multiple of 3. d it is divisible by 10 and a factor of 60.

three-fourths of an hour

36÷48=0.75

0.75=

(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