$8,000 is invested in two different accounts earning 3% and 4% interest. if the two accounts earn a total of $295 in interest, how much money was invested at 3%?
a. $2,500
b. $3,500
c. $5,500

step-by-step explanation:

we have

using a graphing tool

see the attached figure

this is a quadratic equation (vertical parabola) open up

the vertex is a > vertex

the domain of the function is all real > interval (-∞,∞)

the range of the function is the > [-6.125,∞)

the function has two x->   and

the function is increasing over the > (0.25,∞)

the function is decreasing over the > (-∞,0.25)

br tat so much r