How much does one square foot of 16 gauge steel weigh if 15.7 square feet weighs 40.035 lb?

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?

David leaves his house to go to school. he walks 200 meters west and 300 meters north. how far is david from his original starting point?

To find the inverse of a number a, one can use the equation f(c) = a-1/c=0 where c is the inverse of a use the secant method of finding roots of equations to find the inverse of a = 2.5 ,er = 0.001%