I Need someone to do all the questions to the finish with you work shown on each one please and thank you!

Diane owes $387 to her brother. if she debits her bank account $161.25 a month to pay him back, how many months will it take her to pay off the debt?

Weekly wages at a certain factory are normally distributed with a mean of $400 and a standard deviation of $50. find the probability that a worker selected at random makes between $450 and $500

What happens to the area as the sliders are adjusted? what do you think the formula for the area of a triangle is divided by 2?