Help ig??? lil sisters work I’m not helping her HAHAHHAK btw I’m showing her face later after this

The diagram shows a 7cm by 6cm rectangle based pyramid. all the diagonal sides - ta, tb, tc and td are length 10cm. m is midpoint of rectangular base. work out height mt to 1 decimal place

When turned about its axis of rotation, which shape could have created this three-dimensional object?

Let f(x) = 3 − x . find the average rate of change of f(x) from x = a to x = a + h and simplify your answer so that no single factor of h is left in the denominator.