Why in the world did I have nearly 800 points worth of questions deleted? Every single one of them were right! What do I do now?

Which of the following is true for the relation f(x)=2x^2+1

How long must $542 be invested at a rate of 7% to earn $303.52 in interest? in a easier way

Will give brainliestbased on the topographic map of mt. st. helens, what is the contour interval if the volcano height is 2,950 m?