A projectile is launched from ground level with an initial velocity of vo feet per second. Neglecting air resistance, its height in feet t seconds after launch is given by s-16t +Vot. Find the time(s) that the projectile will (a) reach a height of 400 ft and (b) return to the ground when vo is 128 feet per second. (a) Find the time(s) that the projectile will reach a height of 400 ft when vo 128 feet per second. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. ( A. seconds (Use a comma to separate answers as needed.) O B. The projectile does not reach 400 feet.

Elementary Algebra
17th Edition
ISBN:9780998625713
Author:Lynn Marecek, MaryAnne Anthony-Smith
Publisher:Lynn Marecek, MaryAnne Anthony-Smith
Chapter10: Quadratic Equations
Section10.4: Solve Applications Modeled By Quadratic Equations
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A projectile is launched from ground level with an initial velocity of vo feet per second. Neglecting air resistance, its height in feet t seconds after launch is given by
s-16t +Vot. Find the time(s) that the projectile will (a) reach a height of 400 ft and (b) return to the ground when vo is 128 feet per second.
(a) Find the time(s) that the projectile will reach a height of 400 ft when vo 128 feet per second. Select the correct choice below and, if necessary, fill in the answer
box to complete your choice.
( A. seconds (Use a comma to separate answers as needed.)
O B. The projectile does not reach 400 feet.
Transcribed Image Text:A projectile is launched from ground level with an initial velocity of vo feet per second. Neglecting air resistance, its height in feet t seconds after launch is given by s-16t +Vot. Find the time(s) that the projectile will (a) reach a height of 400 ft and (b) return to the ground when vo is 128 feet per second. (a) Find the time(s) that the projectile will reach a height of 400 ft when vo 128 feet per second. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. ( A. seconds (Use a comma to separate answers as needed.) O B. The projectile does not reach 400 feet.
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