Find the zeros of the function f(x) = x2 + 7.1x+ 6.4 to the nearest hundredth.

Find x to the nearest hundredth place

Li buys supplies so he can make and sell key chains. he begins to make a profit only after he sells 4 key chains. what point on the graph makes the most sense in this situation?

With alll of except for the 2 that i did already