Afirecracker shoots up from a hill 140 feet high, with an initial speed of 100 feet per sound. using the formula h(t) = -16t2 + be + s, approximately how long will it take the firecracker to hit the ground? a.) 5 secs b.) 7 secsc.) 9 secsd.) 11 secs

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. what distance from city a is the point where the truck and the car will meet?

I'm confused on this could anyone me and show me what i need to do to solve it.

If the perimeter of the garden is 37 ft. the width is x and the length is 15 ft. what is the width of the garden in feet?