An object was shot up into the air with an initial vertical speed of 640 feet per second. Its height as time passes can be modeled by the quadratic equation y = -16t² + 640t. Here t represents the number of seconds since the object's release, and y represents the object's height in feet. (Use ft for feet, and s for seconds.) a. After 20s, this object reached its maximum height of 6400ft b. This object flew for before it landed on the ground. c. This object was in the air 31 s after its release. d. This object was 6384 ft high at two times: once after its release, and again later after its release.

Algebra and Trigonometry (6th Edition)
6th Edition
ISBN:9780134463216
Author:Robert F. Blitzer
Publisher:Robert F. Blitzer
ChapterP: Prerequisites: Fundamental Concepts Of Algebra
Section: Chapter Questions
Problem 1MCCP: In Exercises 1-25, simplify the given expression or perform the indicated operation (and simplify,...
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Can someone help me with this problem please? I have the first section but I am confused on the rest. Thanks.
An object was shot up into the air with an initial vertical speed of 640 feet per second. Its height as time passes can
be modeled by the quadratic equation y = −16t² + 640t. Here t represents the number of seconds since the
object's release, and y represents the object's height in feet.
(Use ft for feet, and s for seconds.)
a. After 20s, this object reached its maximum height of 6400ft
b. This object flew for
before it landed on the ground.
c. This object was in the air 31 s after its release.
d. This object was 6384 ft high at two times: once
after its release, and again later
after its release.
Transcribed Image Text:An object was shot up into the air with an initial vertical speed of 640 feet per second. Its height as time passes can be modeled by the quadratic equation y = −16t² + 640t. Here t represents the number of seconds since the object's release, and y represents the object's height in feet. (Use ft for feet, and s for seconds.) a. After 20s, this object reached its maximum height of 6400ft b. This object flew for before it landed on the ground. c. This object was in the air 31 s after its release. d. This object was 6384 ft high at two times: once after its release, and again later after its release.
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