7th grade math. i will give brainliest, thx, and 5 stars if correct.

The depth of a lake at a certain point, wich is a function of the distance of that point from shore, is 30 feet.

The coordinate grid shows points a through k. which points are solutions to the system of inequalities listed below? 2x+ ys 10 2x 4y < 8 oa c, d, k o e, f. g, j oa, c, d, h, k oe, f. g, h, j

How many zeros does the function f(x)=4x3-x2+1 have