Answer:
22.470
Step-by-step explanation:
In this example you have to use the trigonometric function sine which is defined as
Plug in known values:

Multiply both sides by 25

Approximate sin(64) using a calculator:

Simplify

Answer:
D.(-1,-5) and (5,7)
Step-by-step explanation:
I used a graphing tool to graph the two equations together. When graphed, the equations intercept (5,7) and (-1,-5). Therefore, they are the solutions to the system.
Option D should be the correct answer.
A = albums, m = # months
$200m + 12a = 644
$200(1) + 12a = 644
200 + 12a = 644
12a = 444
a = 444/12
a = 37
(7 + 5) x 6 + 3. (7 + 5 = 12, 12 x 6 = 72, 72 + 3 = 75.)
1) 32*10^4 is not written in scientific notation because the first factor is not a number betweem 1 and 10.
3.4 * 10^5 is the same number written in scientific notation.
2) 2.01x10^-5 is written in scientific notation.