1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
RideAnS [48]
3 years ago
11

An outfielder throws a baseball to the player on third base. The height h of the ball in feet is modeled by the function h(t) =

-16t2 + 19t + 5, where t is time in seconds. The third baseman catches the ball when it is 4 feet above the ground. To the nearest tenth of a second, how long was the ball in the air before it was caught?
Mathematics
2 answers:
Nesterboy [21]3 years ago
8 0
4=-16t^2+19t+5 
<span>16t^2-19t-1=0 </span>
<span>quadform is (-b+-sqrt(b^2-4ac))/2/a </span>

<span>a=16 </span>
<span>b=-19 </span>
<span>c=-1 
</span>Plug in to the quadratic formula.
<span>1.238 and -.0505.
cant be negative, so it has to be 1.238.</span>
scoray [572]3 years ago
4 0
-16 t² + 19 t + 5 = 4
-16t² + 19 t + 1 = 0
t_{12} = \frac{-19\pm \sqrt{19^{2}-4*(-16)* 1 } }{-32}= \\  \frac{-19\pm \sqrt{361+64} }{-32} =  \frac{-19\pm20.61}{-32}
We will accept: ( another answer is negative )
t = 1.2 s ( to the nearest tenth ) 
Answer: the ball was 1.2 seconds in the air before it was caught.

You might be interested in
What is n, good sir?
lianna [129]

Answer:

n = 80 / 10, or 8.

Step-by-step explanation:

Everything is on the picture.

6 0
3 years ago
What’s the slope ? PLS NEED HELP!
yawa3891 [41]

Answer:

m = -1/2

Step-by-step explanation:

m = slope = rise/run

rise +1

run -2

rise/run = 1/-2

=

-1/2

7 0
3 years ago
Y varies directly as g and v = 36 when g =4 find v when g = 11
Inessa05 [86]
I’m so sorry i’m doing this i really need help with math and i’m writing this but i think the answer is g=11
4 0
3 years ago
To pass a course with aa upper cc ​grade, a student must have an average of 7070 or greater. a​ student's grades on three tests
forsale [732]
The sum of 70, 73, and 65 is 208. Adding a 72 to that equation makes the sum 280. The mean then becomes 70. The answer is 72.
8 0
3 years ago
Two numbers are unknown in the expression ⬜️ * {[(12-3)*3]+(◽️ *6)-8} If the value of the expression is 98 what are the unknown
aksik [14]
Try using 2 and 5.. 2x{[(12-3)x3]+(5x6)-8}=98
5 0
3 years ago
Other questions:
  • What is the slope of the following equation? <br> y = 1/3x + 4
    11·1 answer
  • Five times a number divided by four
    8·2 answers
  • Consider the geometric sequence 1/64, 1/16, 1/4, 1, …. What is the common ratio?
    7·2 answers
  • Use synthetic division to perform the indicate division. Write the poly nominal in the form p(x) = d(x)q(x) + r(x)
    15·1 answer
  • A researcher wishes to conduct a study of the color preferences of new car buyers. suppose that 50% of this population prefers t
    14·1 answer
  • Barrett works at an ice cream shop. The function f(x) represents the amount of money Barrett earns per gallon of ice cream, wher
    5·1 answer
  • Write the equation of the line represented by the following table
    7·1 answer
  • Solve this equation. 34 + x = 63
    9·2 answers
  • What is the nth term for the sequence 5 , 14 , 29 , 50 , 77
    7·1 answer
  • Try and answer! Do your best!
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!