Answer:
$7.12
Step-by-step explanation:
1) 8.9/100 = 0.089
2) 0.089 * 80 = 7.12 (one year)
Answer:
34 cm2
Step-by-step explanation:
because some might have a hard time finding the area, but you can simply just count the squares. And if you do you'll get 34, and you'll always want to label cm. And DONT FORGET TO SQUARE YOUR ANSWER!!
cos(a - b) - cos(a + b) = 2sin(a)sin(b)
[cos(a)cos(b) + sin(a)sin(b)] - [cos(a)cos(b) - sin(a)sin(b)] = 2sin(a)sin(b)
[cos(a)cos(b) - cos(a)cos(b)] + [sin(a)sin(b) + sin(a)sin(b)] = 2sin(a)sin(b)
2sin(a)sin(b) = 2sin(a)sin(b)