Answer: $12000 was invested at 7% while $8000 was invested at 9%.
Step-by-step explanation:
Based on the information given in the question, let the amount that was invested at 7% be n.
Therefore,
0.07n + 0.09(20000 - n) = 1560
0.07n + 1800 - 0.09n = 1560
-0.02n = 1560 - 1800
-0.02n = -240
n = 240/0.02
n = 120
Therefore, $12000 was invested at 7% while $8000 was invested at 9%.
(3x + 14) (3x + 14) = 9x^2 + 24x + 16
Answer: F=6.67 x 10^21
G:6.67 x 10^ -11 N m2/kg2
Answer:

Step-by-step explanation:
Given


Required
Determine the equation (y)
Let the steady rate be represented with r.
So, the equation (y) can be determined using:


