Asalesperson earns $175 per week plus a commission equal to 4% of her sales this week her goal is to earn no less than $525. can someone tell me how to write this as an expression?

I'm so close to finishing all these.

The brain volumes (cm cubed) of 50 brains vary from a low of 904 cm cubed to a high of 1488 cm cubed. use the range rule of thumb to estimate the standard deviation s and compare the result to the exact standard deviation of 175.5 cm cubed, assuming the estimate is accurate if it is within 15 cm cubed

John checked his watch and said that it is thursday, 7 am. what will the day and time be 2006 hours plzzz i will give you 100 points