Ask question

Ask question

All categories

2 years ago

9

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

1 answer:

ohaa [14]2 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

PLZZZZZZZzzz help i dont get it

Anna71 [15]

4/5-3/7. First they need the same denominater: 4/5(7)=28/35, 3/7(5)=15/35. 28/35-15/35. Now subtract numerators: 28-15=13. So your answer H. 13/35 :)

6 0

3 years ago

Read 2 more answers

What are two equivalent ratios of 12:7

kozerog [31]

24:14 and 36:21 are both equivalent ratios to 12:7

4 0

2 years ago

Read 2 more answers

How do u solve this?

kipiarov [429]

Answer:

20/9

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

What is the area of this triangle?

earnstyle [38]

Answer:

depends on what type of triangle it is but generally there are two formulas area of triangle is ½ × base × height and another one is heron's formula used for finding area of triangle it is applicable only when side of a triangle is given A =

$\sqrt{s(s - a)(s - b)(s - c)}$

4 0

3 years ago

abc pens sells pens in boxes of 12 their competitor xyz sells pens in boxes of 144 an office building is considering purchasing

AfilCa [17]

Abc- 12 pens in each box
1,000 boxes are needed of ABC pens
1000x12=12,000
Answer is 12,000 pens are in 1000 Abc boxes of pens.

8 0

2 years ago

Read 2 more answers