Answer:
The multiple choices are:
$5,589.04
$7,452.05
$4,890.41
$5,876.71
$6,410.96
Amount invested in K is $6,410.96
Explanation:
L+K=12,000
from the return perspective
0.0975=K/12000*0.0805+L/12000*0.117
K=12000-L
Substitute for K in the second equation
0.0975=(12000-L)/12000*0.0805+L/12000*0.117
0.0975=(966-0.0805L)/12000+0.117L/12000
0.0975=(966-0.0805L+0.117L)/12000
12000*0.0975=966+0.0365 L
1170 -966=0.0365L
204=0.0365L
L=204/0.0365
L=$ 5,589.04
K=$12,000-$ 5,589.04
K=$6,410.96