Over 4 days, Krista deposited $45 into her bank account, transferred $30 to a friend, deposited $59, and withdrew $18. What was the mean change per day to Krista's account in dollars during that week?

Which is the equation of an ellipse with directrices at x = ±4 and foci at (2, 0) and (−2, 0)?

The average human heart beats 1.15 \cdot 10^51.15⋅10 5 1, point, 15, dot, 10, start superscript, 5, end superscript times per day. there are 3.65 \cdot 10^23.65⋅10 2 3, point, 65, dot, 10, start superscript, 2, end superscript days in one year.how many times does the heart beat in one year? write your answer in scientific notation, and round to one decimal place.

What is the equation of this graphed line? enter your answer in slope-intercept form in the box.