The answer is 13(6.5+6.5)
Use the Midpoint formula
Under a radical it would be
√ ( x↓2 - x↓1 ) ² + ( y↓2 - y↓1 ) ²
The down arrow is subscript -
So use the numbers from the two coordinates to plug in.
If you have any question comment :)
Answer:
537.47712
Step-by-step explanation:
a = 125 ... the first term?
r = 1.2
ok use the formula: a_n = (a_1) * r ^(n-1)
we want a_9 = (a_1) * r^(9-1)
a_9 = 125 * (1.2)^8 = 125 * 4.29981696 = 537.47712
