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 s of 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 t seconds 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 distance d between Laura and the balloon as a function of time. (B) When is the balloon exactly 90 ft from Laura?]