C.) of a total of $10,000, part was invested at 10% simple interest and the remainder at 7%. If the total income for the year was $80s, how much was invested at each rate?

$3,500 at 10% and $6,500 at 7%.

Step-by-step explanation:

M * 10% + (10000 - M) * 7% = 805

0.1M + 700 - 0.07M = 805

0.03M = 105

M = 3500

i think this could be a possible answer (1 / 84) -1

good luck! : d

answer: all of the odd numbers were opened

the first person was the one that was opening all of the lockers. since one is odd, this causes all of the odd number lockers to be opened in the end.