Calculate the length of the circumference of a circle with a radius of 5cm

When you have 25 numbers, and jake picks 3 random numbers and puts them back, what is the chance bob has of picking those 3 numbers when he picks 6 random numbers (without putting them back)? explain.

Asap will give brainiest to first person to answer what is the measure of angle b in the triangle? enter your answer in the box. m∠b=

Find the vertex for the parabola given by the function ƒ(x) = −3x2 − 6x.