Try this option:
1) if csc(u)=9, then 1/sin(u)=9 and sin(u)=1/9;
2) if sin(u)=1/9, then cos(u):

3) 



21 not sure but you can do it
Answer:
$25,740
Step-by-step explanation:
First, converting R percent to r a decimal
r = R/100 = 5%/100 = 0.05 per year,
then, solving our equation
I = 23400 × 0.05 × 2 = 2340
I = $ 2,340.00
The simple interest accumulated
on a principal of $ 23,400.00
at a rate of 5% per year
for 2 years is $ 2,340.00.
Answer:
1728 for A
7290000 for B
Step-by-step explanation:
Answer: 3m
Step-by-step explanation:
You're multiply 3 by m. Since this isn't possible unless you have m's value, you must write the expression as 3m.