Dale invested his savings in two investment funds. the $4000 that he invested in fund a returned a 5% profit. the amount that he invested in fund b returned a 2% profit. how much did he invest in fund b, if both funds together returned a 3% profit?

Dale invested in fund B $8,000

Step-by-step explanation:

We can arrange the given information into the nex equation:

4000*5% + x*2% = (4000+x)*3%

4000*0.05 + 0.02x = 4000*0.03 + 0.03x

200 + 0.02x = 120 + 0.03x

200 - 120 = 0.03x - 0.02x

80 = 0.01x

x = 80/0.01

x = 8,000 He invested in fund B.

option a is correct.

step-by-step explanation:

scale factor: it is used to find proportional measurements.

proportions means having the same ratio.

scale factor is the ratio of the model measurement to the actual measurement in a simplest form.

or we can say that the ratio of any two corresponding lengths in two similar geometric figures

if the scale factor is more than 1, then it is an enlargement,

if the scale factor less than 1, then it is a reduction.

given the two geometric figure:

by definition of proportions, we have

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step-by-step explanation: