Answer:
<B = 15
Step-by-step explanation:
A triangle adds up to 180 degrees.
Since these triangles are similar, the sides are located in the same spot. (A is in same spot as D, etc.)
A=75
F=90
75 + 90 + x = 180
165 + x = 180
x = 15
The mountain will be at 80mm long in 50 years because 50 times 1.6mm equals 80
8% of 1000 = 80
8% of 1080 = 86.4
8% of 1166.4 = 93.31
8% of 1259.71 = 100.77
8% of 1360.48 = 108.8
$1469.28
Rounded: $1469
