Convert 0.0000678 into scientific notation. What exponent will 10 be raised to?
-5
-4
4
5

6.78 x 10^-5

Step-by-step explanation:

The decimal is raised 5 places to the right, so you have to use -5

answer: bea's uncle is 25 years old.

step-by-step explanation:

given the equation , we can say that the variable "x" represents the age of bea's uncle. then to find his age, we need to solve for "x":

we must add 15 to both sides of the equation:

now we need to divide both sides of the equation by 3:

therefore, we can conclude that bea's uncle is 25 years old.