Hundredths place=9
Ones place=6
The square roo it 7.07106781 i
The sine of any acute angle is equal to the cosine of its complement. the cosine of any angle is equal to the sine of its complement also
He will do both in 12 days since the least common multiple of 3 and 4 is 12. This can be found by making a list of both numbers' multiples. You will see that the first common number or multiple is 12.
Multiples of 3: 3, 6, 9, 12, 15
Multiples of 4: 4, 8, 12, 16, 20
Hope this helped