I'm sorry for having to ask like this. I've never been good at word problems.

I'm sorry for the poor quality of the pictures, I had to use a picture editor instead of something like paint. Also, if it helps, we have only done number patterns and equations and inequalities before this.

- As a weather balloon is inflated, its radius increases at the rate of 4 cm per second. Express the volume of the balloon as a function of time, and determine the volume of the balloon after 4 seconds.
- Express the surface area of the weather balloon in the above problem as a function of time.
- (this one has a picture, I tried to get the basics) Brandon, who is 6 feet tall, walks away from a streetlight that is 15 ft high at a rate of 5 feet per second, as shown in the figure. Express the length
sof Brandon's shadow as a function of time.- (This one has a picture, too) A water-filled balloon is dropped from a window 120 ft above the ground. Its height above the ground after
tseconds is 120-16t(squared) ft. Laura is standing on the ground 40 ft from the point where the balloon will hit the ground, as shown in the figure. (A) Express the distancedbetween Laura and the balloon as a function of time. (B) When is the balloon exactly 90 ft from Laura?]