Please answer the red circle part which I'm wrong about. Thanks "The solution corresponding to the − sign, rounded to two decimal places, ist =......." A rock is thrown downward, and the distance D, in feet, that it falls in t seconds is given by D = 16t2 + 7t.Exercise (a)Find how long it takes for the rock to fall 330 feet by using the quadratic formula.Step 1To find when the rock has fallen 330 feet we need to solve the equation 16t + 7t = 330quadratic formula tells us that the solution of at? + bt +c = 0 is330The-bt V b2t =4ac2aThe first step is to subtract 330 from each side to get16t2 + 7t - 330 = 0Step 27Now we apply the quadratic formula with a = 16|-330,b =and c =-b t V b2 - 4act =2a-(7V )+ V 72 - 4 x 16 x (-3302 x 16The solution corresponding to the + sign, rounded to two decimal places, ist = 4.33The solution corresponding to the - sign, rounded to two decimal places, ist = |-4.760The second of these times has no physical meaning, but from the first we see that it takes the rock4.33seconds to fall 330 feet.

The red circle part can be answered as below

Answered: Please answer the red circle part which…

Please answer the red circle part which I'm wrong about. Thanks "The solution corresponding to the − sign, rounded to two decimal places, is t =......."

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter9: Quadratic Functions And Equations

Section9.6: Solving Quadratic Equations By Using The Quadratic Formula

Problem 41PPS

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Please answer the red circle part which I'm wrong about. Thanks

"The solution corresponding to the − sign, rounded to two decimal places, is

t =......."

A rock is thrown downward, and the distance D, in feet, that it falls in t seconds is given by D = 16t2 + 7t.
Exercise (a)
Find how long it takes for the rock to fall 330 feet by using the quadratic formula.
Step 1
To find when the rock has fallen 330 feet we need to solve the equation 16t + 7t = 330
quadratic formula tells us that the solution of at? + bt +c = 0 is
330
The
-bt V b2
t =
4ac
2a
The first step is to subtract 330 from each side to get
16t2 + 7t - 330 = 0
Step 2
7
Now we apply the quadratic formula with a = 16
|-330
,b =
and c =
-b t V b2 - 4ac
t =
2a
-(7
V )+ V 72 - 4 x 16 x (-330
2 x 16
The solution corresponding to the + sign, rounded to two decimal places, is
t = 4.33
The solution corresponding to the - sign, rounded to two decimal places, is
t = |-4.760
The second of these times has no physical meaning, but from the first we see that it takes the rock
4.33
seconds to fall 330 feet.

Two-dimensional figure measured in terms of radius. It is formed by a set of points that are at a constant or fixed distance from a fixed point in the center of the plane. The parts of the circle are circumference, radius, diameter, chord, tangent, secant, arc of a circle, and segment in a circle.

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