What is the best estimate for the product of 289 and 7

In the diagram below? p is circumscribed about quadrilateral abcd. what is the value of x

In a right triangle δabc, the length of leg ac = 5 ft and the hypotenuse ab = 13 ft. find: b the length of the angle bisector of angle ∠a.

Let f of x equals the integral from 1 to 3 times x of the natural logarithm of t squared. use your calculator to find f″(1).