Dave earns $150 per week plus 3.8% commission. he sold $4175.68 in the month of february. what is his gross monthly earning for february?

Ican figure out 20 shares multiply by $117.98 =2359.6920 shares multiply by $124.32=2486.40then take 40 shares multiply by $128.48=5139.20after that i'm lost any be greatly appreciated.

The weight of full–grown tomatoes at a farm is modeled by a normal distribution with a standard deviation of 18.4 grams. the 95 percent confidence interval for the mean weight of the tomatoes is calculated using a sample of 100 tomatoes. what is the margin of error (half the width of the confidence interval)?

Erin bought christmas cards for $2 each to send to her family and friends. which variable is the dependent variable?