Rule of 72 is (72/interest%), so we do
(72/2.1%)=34.3
the answer is B
Sine m/3 = sine 90 /5
Sine m times 5 = sine 90 times 3
5(sine m) = 1 times 3
Divide by 5
Sine m= 3/5
Second sine m =.6
35
SinA=cos(90-A)
Notice here 52=90-38
so the answer is 0
We get all these to have the same denominators for all the fractions.
2*2/9*2 = 4/18
1*2/9*2 = 2/18
1*3/6*3 = 3/18
Now we can add all the numerators.
4/18 + 2/18 + 3/18 = 9/18
Simplify our answer by dividing both numbers by 3, then by 2.
9/3 and 18/3 = 3/6= 1/2
Our final answer is 1/2
108 idk what a gcf is and i am just adding 60 and 48