What percent of the second ten natural numbers are prime numbers?

40%

Step-by-step explanation:

The second ten natural (counting) numbers are:

11, 12, 13, 14, 15, 16, 17, 18, 19, 20

Out of these, the prime numbers are:

11, 13, 17, 19

This is 4 numbers out of 10; this makes

4/10 = 0.4 = 40%

(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