A cube has an length of 9 meters. What is it’s volume, in cubic meters?

What is the value of x? enter your answer in the box. (cm)

Acar started driving from city a to city b, distance between which is 620 miles, at a rate of 60 mph. two hours later a truck left city b and started moving towards city a at a rate of 40 mph. how many hours after the truck's departure will the two meet?

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).