If i mow my neighbor's lawn, then i will earn $5. which of the following is a logically equivalent statement to the conditional statement above?

if i do not mow my neighbor's lawn, then i will not earn $5.
if i mow my neighbor's lawn, then i will not earn $5.
if i did not earn $5, then i did not mow my neighbor's lawn.
if i earned $5, then i mowed my neighbor's lawn

On the way home from visiting his family, vincent’s plane cruised at an altitude of 3.2 × 10^4 feet. he had heard that a man named felix baumgartner skydived from an altitude of 1.28 × 10^5 feet. vincent wants to know how much higher felix went on his skydiving trip. question 1 you have already seen how adding numbers works in either scientific notation or standard notation. but can you subtract numbers in scientific notation and get the same results as subtracting in standard notation? to find out, first solve vincent’s problem in standard notation. part a write the cruising altitude of vincent’s plane in standard notation.