According to Hooke's Law, the force required to hold the spring stretched x m beyond its natural length is given by f(x) = kx,
where k is the spring constant.
Suppose that 24 J of work is needed to stretch a spring from 12 cm to 16 cm and another 40 J is needed to stretch it from 16 cm to 20 cm. Find the exact value of k, in N/m.

What aspects of lines have to be diffrent

Ascientist wants to use a model to present the results of his detailed scientific investigation. why would a model be useful? a )because the model makes the concepts easier to understand b) because the model is easy to put together and to use c) because the model prevents other scientists from asking questions d) because the model requires the audience to pay full attention to it i don't know what to choose because between a and d a is much more likely than d because it only wants to get the attention of the audience. i'm confuse.

A10 inch cookie cake is divided into 8 slices. what is the area of 3 slices