What is 0.42 in a fraction in simplest form

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.

Your friend uses c=50p to find the total cost, c, for the people, p, entering a local amusement park what is the unit rate and what does it represent in the context of the situation?

If my mom gets $13.05 an hour, and she works from 3: 30 to 10: 45 in the morning, how much money does my mom make?