Greg invested $11,000 in two accounts. • The first account pays 5% interest per year.
• The second account pays 8% interest per year.
• Greg earned a total of $752.50 in interest at the end of the first year.
How much did Greg invest in the 5% account?
A. $6,750
B. $3,415
C. $5,500
D. $4,250

The amount invested in the 5% account is $4,250

Step-by-step explanation:

Let the amount invested in the first be $x and the amount invested in the second be $y

Total of both is $11,000

Thus, we have

x + y = 11,000 •••••••••(i)

For the first account, the interest earned will be;

5/100 * x = 5x/100 = 0.05x

For the second account , the interest earned will be;

8/100 * x = 0.08x

Adding both gives the total amount of interest

That will be ;

0.05x + 0.08y = 752.50 •••••(ii)

From equation i above;

y = 11,000 - x

Substitute this into ii

0.05x + 0.08(11,000-x) = 752.5

0.05x + 880 - 0.08x = 752.5

0.08x-0.05x = 880-752.5

0.03x = 127.5

x = 127.5/0.03

x = $4,250

answer: the dogs need to shift their focus to human scent.

its because the dogs being trained are for search and rescue thus they need to be able to track humans and their specific scent