A scientist needs 150mL of a 15% acid solution for an experiment. The lab has available a 10% and a 25% solution. How many milliliters of the 10% and how many milliliters of the 25% solutions should the scientist mix to make the 15% solution?

1. 8

2. 9

3. 20

4. 3

5. 17

6. 2.2

7. 11.25

8. 1

9. 14

10. 2

step-by-step explanation:

thats the first half

to determine the unit cost your would divide the total cost by the number sold.

7 bagels for $4.41       $4.41/7 = $.63 each at fresh side

5 bagels for $3.60         $3.60/5 = $.72 each at value mart

not sure but it may be b, as i said i'm not sure.

answer:   c ?

step-by-step explanation: