Consider the following information. 1 hour=3.6x10^3 seconds, 1 day=24 hours, 1 year=3.65x10^2. Use scientific notation to calculate the number of seconds in 3 days

Simplify the expression. -2/5(10+15m-20n)

What is x and y intercepts for y=x+7

The figure shows triangle def and line segment bc, which is parallel to ef: triangle def has a point b on side de and point c on side df. the line bc is parallel to the line ef. part a: is triangle def similar to triangle dbc? explain using what you know about triangle similarity. part b: which line segment on triangle dbc corresponds to line segment ef? explain your answer. part c: which angle on triangle dbc corresponds to angle f? explain your answer. asap