Melody

6! means   1*2*3*4*5*6

that are all multiply signs  :)

It is really good that you asked   

Have lots of fun :))

it is an isosceles triangle is one leg is 5 then so is the other.

It is right angles so not use Pythagorases theorum.

Thanks Alan :)

Many of the people who answer questions here are retired, hence their eye sight has deteriorated.

You will increase your chance of an answer if a microscope is not needed to discern the question.

This is a reapeat question. Now ity has been answered twice.

One question per post thanks and not multiple questions posted in the same time frame.

Hi EP

It is good that we have done it different ways. One (or both)  of us has probably made a little mistake as the answers should be closer. Still, the asker probably wanted one way or the other, now they have both.  :)

projectile motion problems figure 2 

A ball is kicked at an angle θ = 45°. It is intended that the ball lands in the back of a moving truck which has a trunk of length L = 2.5 m. If the initial horizontal distance from the back of the truck to the ball, at the instant of the kick, is do = 5 m, and the truck moves directly away from the ball at velocity V = 9 m/s (as shown), what is the maximum and minimum velocity vo so that the ball lands in the trunk. Assume that the initial height of the ball is equal to the height of the ball at the instant it begins to enter the trunk.

You need to check my answer very carefully before you accept it. There is a lot of room for errors . 

That should have been 17.1 m/s  and 18.8 m/s

it is a rectangular prism. How do you find the volume of a rectangular prism?

Google it if you don't know. 

Start by plotting the point in the number plane.

Then you can use pythagoras's theorum to work out the value of the sides in the right angle triangle with the point given. that is  (0,0) (3,-7) (3,0)

You are in the 4th quad so sine will be negative.