1. how is 0.00069 written in scientific notation? (1 point).
o 69x10--
06.9x104
o 0.69x107
0692104

Explanation:

When a number is written in scientific notation (representing the number using powers of base ten) it is expressed so that it contains a digit in the place of the units and all other digits after the decimal point, multiplied by the respective exponent.  

Then, the significant digits will be the digits that are before the power of ten.

In the case of  we have to move the decimal point to the right and the power of base ten will be equal to the spaces moved to the right:

the total distance that martina travels that day is

(distance from home to mom's office) plus (distance from mom's office to school)

plus (distance from school to library) plus (distance from library to friend's house)

plus (distance from friend's house to martina's house).

(we don't know what any of these distance actually is.)

a 2,000 calorie based diet.