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
Nadya [2.5K]
3 years ago
9

The path of firework is modelled using the equation h= -5d2+20d+1 what is the maximun height?

Mathematics
1 answer:
ohaa [14]3 years ago
8 0
h=-5d^2+20d+1\\h'=-10d^2+20d=0\\-10d(d-2)=0\\d=0,2\\\\h=-5(2)^2+20(2)+1\\h=-5(4)+40+1\\h=-20+41\\h=21

21 units
You might be interested in
Which shows the use of a credit card
kotykmax [81]
C is what you do when credit cards are involved.
7 0
3 years ago
Kelly has some apples, bananas and oranges. The ratio of the number of apples to the total number of fruits us 1:4. There are 30
madreJ [45]
Total fruits→120=4u
apples=30=1u
3u=90→banana and oranges
banana→1u
oranges→2u
oranges=60

8 0
3 years ago
12 A pilot needs to know the maximum height an aircraft can fly at. The cabin has been tested and is safe to a height of 15679 m
abruzzese [7]
15.6 kilometers rounded down because it is not safe to go above what has been approved
7 0
1 year ago
Samuel has 20$ in his savings account before he makes a deposit of $160. After 2 weeks, he withdraws $160. How did samuels savin
olganol [36]
Since he deposited 160 then took out 160 it did not change
6 0
3 years ago
Which equation can be used to find what percent 14 is of 125?
IgorC [24]

Answer:

B. 14 = 125p

Step-by-step explanation:

6 0
3 years ago
Other questions:
  • What's the equivalent fraction of 8/9 and 3/11
    9·1 answer
  • a pattern has 14 triangles to every 18 yellow triangles. what is the ratio of yellow triangles to blue triangles?
    8·2 answers
  • If cos Theta < 0, which quadrent(s) could the terminal side of Theta lie?
    10·1 answer
  • How do you write " h ft above sea level" and "d dollars for b books" in an expression
    5·1 answer
  • 4(x-b)=x , solve for x
    15·1 answer
  • Latoya is on her way home in her car. She has driven 30 miles so far, which is five-sixths of the way home. What is the total le
    11·2 answers
  • 2. Consider a sequence where f(1) = 1,f(2) = 3, and
    15·1 answer
  • Find the number of distinguishinable permutations of the digits 348 838
    11·1 answer
  • (b)<br> Using the formula 2T = M + 3K, find the value of K when T = 11 and M = 4.
    6·1 answer
  • I need help with this question.​
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!