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
Nady [450]
2 years ago
12

the height of a football in the air t seconds after it is thrown can be modeled by the function y=-16t^2+96t+3, where y are meas

ured in feet and t is time. What is the maximum height that the football reaches? How long did it take the football to reach the maximum height? At what times will the football be above the ground at 122 feet?
Mathematics
1 answer:
Flauer [41]2 years ago
6 0
Since the function is a parabola, the maximum height would be the y-coordinate of the vertex. The x-coordinate of the vertex in standard parabolic form is
x = -b/2a.
In the problem, t would now be x.
t = -96/(2*-16) = 3*

Now that you have the time as 3 at the vertex, you can determine the height y at the vertex by substituting it in.
y = -16(3)^2 + 96(3) + 3
y = 147*

If they give you 122 feet and you need to find the time, then just plug that as y and solve for t.
122 = -16t^2 + 96t + 3
0 = -16t^2 + 96t - 119
t = 17/4, 7/4*

*Brainliest answer is always appreciated

You might be interested in
Find x in this picture pls
blondinia [14]

Answer:

X=62

Step-by-step explanation:

solve half of it like 90 degrees +22 degrees. then minus from 180 degrees

3 0
2 years ago
Read 2 more answers
Complete two ratios to describe the model. 4 dark blue triangles and 12 light blue triangles. The ratio of light blue triangles
____ [38]

Answer:

1:3

Step-by-step explanation:

4:12 simplified is 1:3. for every 1 dark blue there are 3 light blues.

5 0
3 years ago
Read 2 more answers
What is the answer and why is it correct explain
Colt1911 [192]
Top left is you answer
7 0
2 years ago
Frank had b bottles of water before his friends came over. His friends drank 7 bottles of water. After his friends left, Frank w
evablogger [386]
The answer is B, because it all goes in order so no need for parentheses
3 0
3 years ago
Read 2 more answers
The Pacific halibut fishery has been modeled by the differential equation dy dt = ky 1 − y K where y(t) is the biomass (the tota
Dafna1 [17]

Answer:

a. The biomass weighs 2.30 * 10^7 kg after a year

b. It'll take 2.56 years to get to 4*10^7kg

Step-by-step explanation:

a.

k = 0.78,K = 6E7 kg

Given

dy/dt = ky(1- y/K)

Make ky dt the subject of formula

ky dt = dy/(1-y/K) --- make k dt the subject of formula

k dt = dy/(y(1-y/K))

k dt = K dy / y(K-y)

k dt = ((1/y) + (1/(K-y)))dy ---- integrate both sides

kt + c = ln(y/(K-y))

Ce^(kt) = y/(K-y)

Substitute the values of k and K

Ce^(0.78t) = y/(6*10^7 - y) ----- (1)

Given that y(0) = 2 * 10^7kg

(1) becomes

Ce^(0.78*0) = (2 * 10^7)/(6*10^7 - 2*10^7)

Ce° = (2*10^7)/(4*10^7

C = 2/7

Substitute 2/7 for C in (1)

2/7e^0.78t = y/(6*10^7 - y) ---(2)

We're to find the biomass a year later

So, t = 1

2/7e^0.78 = y/(6*10^7 - y)

0.62 = y/(6*10^7 - y)

y = 0.62(6*10^7 - y)

y = 0.62*6*10^7 - 0.62y

y + 0.62y = 0.62*6*10^7

1.62y = 0.62*6*10^7

1.62y = 3.72 * 10^7

y = 2.30 * 10^7kg.

Hence, the biomass weighs 2.30 * 10^7 kg after a year

b.

Here, we're to calculate the time it'll take the biomass to get to 4*10^7 kg

Substitute 4*10^7 for y in (2)

2/7e^0.78t = 4*10^7/(6*10^7 - 4*10^7)

2/7e^0.78t = 4*10^7/2*10^7

2/7e^0.78t = 2

e^0.78t = (2*7)/2

e^0.78t = 2

t = 2 * 1/0.78

t = 2.56 years

Hence, it'll take 2.56 years to get to 4*10^7kg

8 0
3 years ago
Other questions:
  • Historically, in the early to middle 1900’s, households that had a telephone in their home were considered to earn an above aver
    8·1 answer
  • What is QR to the nearest tenth
    11·1 answer
  • 40 is what percent of 50? 8% 12.5% 80% 125%
    8·2 answers
  • Write the expression as a single logarithm 7log(x) y + 6 log(b) x
    8·1 answer
  • Determine whether you need to add or subtract using rules of signed numbers
    15·1 answer
  • There are 15 numbers on a list, and the smallest number is changed from 12.9 to 1.29.
    15·1 answer
  • The base of a triangular pyramid is a triangle with a base of 4 inches and a height of 3.5 inches. The height of the triangular
    7·1 answer
  • Jack's dog weighs 25 pounds. the vet says that his dog must loose 30% of his weight to be healthier. how much weight is the vet
    14·1 answer
  • .82828282828282 as a simplified fraction
    6·1 answer
  • I NEED HELP IVE BEEN STUCK FOR 20 MIN PLEASE
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!