Which of the following uses scientific notation
incorrectly?
(View picture)

You and a friend race across a field to a fence and back. your friend has a 50-meter head start. the equations shown represent you and your friend's distances dd (in meters) from the fence tt seconds after the race begins. find the time at which you catch up to your friend. you: d=∣−5t+100∣d=∣−5t+100∣ your friend: d=∣−313t+50∣∣

Mustafa contributes 11% of his $67,200 annual salary to his 401k plan. what is his pretax income

The hawaiian alphabet has 12 letters. how many permutations are posible for each number of letters?