Anna makes $100 a week. she spends $70 a week and saves the rest. she is saving to buy a $240 sound system. how long will it take her to save the money?

a. 3 weeks

b. 4 weeks

c. 6 weeks

d. 8 weeks

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

In two or more complete sentences, formulate how to use technology to calculate the appropriate regression model for the given data. you are not required to find the model, just choose the appropriate regression and explain how to use the technology. (-5,,2.,0.8), (0,-0.5), (2,-1.3), (3,-0.8), (5,2)

How do i do this activity, is appreciated