What is the answer to this problem i scientific notation (3.5*10^-5)(3*10^-10)

1.05 ×  10^-14

Step-by-step explanation:

Move the decimal so there is one non-zero digit to the left of the decimal point. The number of decimal places you move will be the exponent on the  10 . If the decimal is being moved to the right, the exponent will be negative. If the decimal is being moved to the left, the exponent will be positive.

First multiply 3.5 ×  3 = 10.5, move the decimal to the left 1 time, 1.05, because you can't pass no further than 10.

Add the exponent, -5 + -10 = -15, since the the decimal been moved to the left 1 time, it add it to -15, which will be -15 + 1 = -14

1.05  ×  10^ - 14

5/12, or 5: 12

step-by-step explanation:

e^-kt = n/n0 = 0.79  

-kt = ln 0.79  

t = - ln 0.79/0.0001  

= 2357 years

step-by-step explanation: