Between which weeks was the change in money earned the greatest?

weeks 1 and 6
weeks 2 and 4
weeks 4 and 6
weeks 1 and 4

What is the celsius temperature that is equal to 94 degrees fahrenheit using the formula f=9/5 c+32

Find the number of real number solutions for the equation. x2 + 5x + 7 = 0 0 cannot be determined 1 2

Expresa commuter train leaves downtown sation and travels at a average speed of 55 miles per hour towards the north side sation, which is 50miles away. thirty minutes later, express commuter train #7 leaves north side and travels at a average speed of 35miles per hour towards downtown sation. at the moment the two trains pass each other, how far(in miles) is train #12 from the downtown sation and how long(in minutes) has the #12 train been traveling