(2×6)-7+9^2+45÷5
Order of operations

95

Step-by-step explanation:

Simplify the following:

2×6 - 7 + 9^2 + 45/5

The gcd of 45 and 5 is 5, so 45/5 = (5×9)/(5×1) = 5/5×9 = 9:

2×6 - 7 + 9^2 + 9

2×6 = 12:

12 - 7 + 9^2 + 9

9^2 = 81:

12 - 7 + 81 + 9

| 1 |  

| 8 | 1

| 1 | 2

+ | | 9

1 | 0 | 2:

102 - 7

| | 9 |  

| 0 | 10 | 12

| 1 | 0 | 2

- | | | 7

| 0 | 9 | 5:

 95

  n=   0.0000 - 0.3750 i  

  n=   0.0000 + 0.3750 i

step-by-step explanation:

one of these should be correct

step-by-step explanation:

the original amount doesn't ''re just looking for the time it takes for 1/2 of the substance to we have

(1/2) =)     take the ln   of both sides

ln (1/2)   = )   and we can write

ln(1/2) = ) lne     and lne   = 1     so we have

ln(1/2) = -.1092t     divide both sides by -.1092

t = ln(1/2)/-.1092 = about 6.347 days = about 6.3 days (rounded)