The power generated by an electrical circuit (in watts) as a function of its current ccc (in amperes) is modeled by: P(c)=-20(c-3)^2+180P(c)=−20(c−3) 2 +180

Answers

Answer 1

Answer:

The current that produces maximum power is 3A

Step-by-step explanation:

Given

[tex]P(c) = 20(c - 3)^2[/tex]

Required [Missing from the question]

The current that produces maximum power

First, we represent the function in standard form

[tex]P(c) = 20(c - 3)^2[/tex]

[tex]P(c) = 20(c - 3)(c - 3)[/tex]

Open bracket

[tex]P(c) = 20(c^2 -6c+ 9)[/tex]

[tex]P(c) = 20c^2 -120c+ 180[/tex]

The maximum value of c is:

[tex]Max(c) = \frac{-b}{2a}[/tex]

Where:

[tex]f(x) = ax^2 + b^2 + c[/tex]

By comparison: [tex]P(c) = 20c^2 -120c+ 180[/tex]

[tex]a = 20[/tex]

[tex]b = -120[/tex]

[tex]c = 180[/tex]

So, we have:

[tex]Max(c) = \frac{-b}{2a}[/tex]

[tex]Max(c) = \frac{-(-120)}{2 * 20}[/tex]

[tex]Max(c) = \frac{120}{40}[/tex]

[tex]Max(c) = 3[/tex]


Related Questions

2. Given: g(x) = x2
What is g(4) = ?
4
0
16
49

Answers

Answer:

16

Step-by-step explanation:

Simply plug 4 into g(x)

g(x) = x^2

g(4) = (4)^2 = 16

Kevin works at an electronics store. He is paid $500 every week plus a 4% commission on anything he sells. Select TWO statements about Kevin's weekly paycheck that are true.

A Kevin's paycheck is for $600 when he sells $250 of merchandise in a week.

B Kevin's paycheck is for $620 when he sells $600 of merchandise in a week.

C Kevin's paycheck is for $620 when he sells $3,000 of merchandise in a week.

D Kevin's paycheck is for $820 when he sells $800 of merchandise in a week.

E Kevin's paycheck is for $900 when he sells $10,000 of merchandise in a week.

F Kevin's paycheck is for $1,000 when he sells $1,250 of merchandise in a week.

Answers

Answer:

b)   (d

Step-by-step explanation:

no words


PLEASE HELP

Cal uses the equation y = 2.92
+ 2.4 to model his data. Use this equation to make the
following predictions.
Enter a number in each space provided
After 25 weeks, Cal will have saved a total of $____
The least number of whole weeks Cal must save to have a total of $100 saved is ____

Answers

Answer:

(a) $62.92 saved in 25 weeks

(b) 41 weeks to save $100

Step-by-step explanation:

Given

[tex]y = 2.92 + 2.4x[/tex]

[tex]x \to weeks[/tex]

[tex]y \to savings[/tex]

Solving (a): Savings in 25 weeks.

This means that: x = 25

So:

[tex]y = 2.92 + 2.4x[/tex]

[tex]y = 2.92 + 2.4 * 25[/tex]

[tex]y = 2.92 + 60[/tex]

[tex]y = 62.92[/tex]

Solving (b): Whole weeks to save $100

This means that x = 100

So:

[tex]y = 2.92 + 2.4x[/tex]

[tex]100 = 2.92 + 2.4x[/tex]

Collect like terms

[tex]2.4x = 100 - 2.92[/tex]

[tex]2.4x = 97.08[/tex]

Solve for x

[tex]x = 97.08/2.4[/tex]

[tex]x = 40.45[/tex]

Round up

[tex]x = 41[/tex]

A quantity with an initial value of 7200 decays exponentially at a rate of 0.3% every
day. What is the value of the quantity after 10 weeks, to the nearest hundredth?

Answers

Answer:5834.36 You're welcome

Answer:5834.36

Step-by-step explanation:

A rock climber is standing at the edge of a cliff looking down into a valley and sees a lion laying 120 feet from
the base of the cliff. The angle of depression of the rock climber to the lion is 35º. How high is the cliff in feet?

Answers

360 degrees
Hope this helps

(NEED DONE SOON) The measure of two supplementary angles are 4x - 24 and 4(2x - 3).
What is x

Answers

Answer:

X=18

Step-by-step explanation:

since angles are supplementary that means their sum is 180

[tex]4x - 24 + 4(2x - 3) = 180 \\ 4x - 24 + 8x - 12 = 180 \\ 12x - 36 = 180 \\ 12x = 216 \\ x = 18[/tex]

PLZZZ HELP FAST
what is the value of y
[tex]y ^3 = 5[/tex]

Answers

Answer: y= [tex]\sqrt[3]{5}[/tex]

Step-by-step explanation:

Your answer below . You can either put in radical form or appx decimal form see below

Find the area of the shaded region.
00
please help!! i will mark brainliest, no links please!!

Answers

Answer:

180 i think

hope it helped

Answer:

area = 118.04 units²

Step-by-step explanation:

area of circle = πr² = (3.14159)(8²) = 201.06 units²

area of triangle:

corner angle - 60°/2 = 30°

sin 30° = m/8, m = 4

height of triangle = 4 + 8 = 12

cos 30° = n/8, n = 6.93, n = 1/2 base

base of triangle = 13.86

area of triangle = 1/2bh = 1/2(13.86)(12) = 83.02 units²

area of shaded portion = 201.06 - 83.02 = 118.04 units²

k heres the actual question

Answers

Answer:

It's most likely spposed to be 22

Step-by-step explanation:

Answer: 91.65

Part 1: You will need to find the average by adding 108, 72, and 95. This will give you 275. Now you divide the sum by the amount of numbers there are which is 3 numbers. 275/3 would be 91.6

Part 2: Now that you have all four numbers you should repeat the process, 108 + 72 + 95 + 91.6 which is 366.6 now divide by four, and you have 91.65.

Let me know if this was correct!

What is the correct answer?

Answers

Green 36 because you set 2x-8 = 64 and solve by adding 8 to both sides and getting 72 and dividing that by 2 which is 36

drag each expression to show whether it is equivalent to 3 time times 9 or to 2x3x9​

Answers

Answer:

The answers to your questions are given below

Step-by-step explanation:

A. 3 × 9 = 27

B. 2 × 3 × 9 = 54

Next, we shall determine which option will give the same result obtained above.

9 × 3 = 27

9 × 3 × 2 = 54

3 × (4 + 5) = 3 × 9 = 27

(2 × 3) × 9 = 6 × 9 = 54

Therefore,

3 × 9 = 27

9 × 3 = 27

3 × (4 + 5) = 27

2 × 3 × 9 = 54

9 × 3 × 2 = 54

(2 × 3) × 9 = 54

SUMMARY

3 × 9 >>>>>>>>> 2 × 3 × 9

9 × 3 >>>>>>>>> 9 × 3 × 2

3 × (4 + 5) >>>>> (2 × 3) × 9

If two sides in a triangle are congruent, the angles opposite the congruent sides are congruent angles.

True or False

Please make an answer and give brainliest and more points to 100 need it please!
Thank you

Answers

Answer:

True

Step-by-step explanation:

Two triangles are congruent if they satisfy any of the following:

Two sides and the included angle of one triangle equal to the corresponding parts of the other one.

Two angles and the included side of one triangle equal to the corresponding parts of the other one.

All three sides of one triangle equal to the corresponding parts of the other one.

They are right triangles, and hypotenuse and one leg of one triangle equal to the corresponding parts of the other one.

They are right triangles, and hypotenuse and one acute angle of one triangle equal to the corresponding parts of the other one.

Therefore, the answer is true.

Nice Question

Answer To It is True

Reason:- According To Isosceles Triangle Theorem:-

If two angles of a triangle are congruent, then sides opposite those angles are congruent.

Hope This Helps You ❤️


How many different sandwiches can be made from the following options?
4 types of bread
3 types of cheese
6 types of meat
a: 13
b: 72
C: 42

Answers

Answer:

72

Step-by-step explanation:

By using the fundamental counting principle, we can do 4 x 3 x 6 = 72 to find how many different sandwiches can be made.

The point B(-6, -2) is rotated 90° counterclockwise
coordinates of the resulting point, B'?

Answers

Answer:

(2, -6)

Step-by-step explanation:

Draw a picture woth a point at (-6, -2)

the rotate it.

1. Find mYX.

50 points if answer.

Answers

Answer:

m<YX=60° is a required answer

Answer:

m<YX=60° is a required answer

Step-by-step explanation:

Please HELP if you can!

A sample of automobile dealerships found that 19% of automobiles sold are silver. If two cars are randomly selected, what is the probability that the color of the first car is silver and the color of the second car is also siver?
A. 0.361
B. 0.0361
C. 0.380
D. 0.190

Answers

Answer:

C 0.0361

Step-by-step explanation:

The probability that the color of the first car is silver and the color of the second car is also siver is 0.0361.

Given that,

A sample of automobile dealerships found that 19% of automobiles sold are silver.The color of the first car is silver and the color of the second car is also siver.

Based on the above information, the calculation is as follows:

[tex]= 0.19\times 0.19[/tex]

= 0.0361

Learn more: brainly.com/question/17429689

cos x = 4/5, cos y = 24/25, find tan(x+y)

Answers

Answer:

1 19/25

Step-by-step explanation:

4

5

+  

24

25

=  

4 × 5

5 × 5

+  

24

25

=  

20

25

+  

24

25

=  

20 + 24

25

=  

44

25

=  

1 19

25

Find the surface area of the
triangular prism.
8 m
6 m
7 m.
10 m
[?] sq m.
ntar

Answers

Answer:

216

Step-by-step explanation:

The triangular prism given here is consisting of two triangles and three rectangles

So the area of the triangular prism = area of the two triangles and the area of the three rectangles

= Surface Area ₚᵣᵢₛₘ =[2 ×1/2×8×6] m²+[3×7×10]m²

= (48+210)m²

= 258m² (ans)

Which function is continous across its domain? Pls help

Answers

Answer:

Step-by-step explanation:

A function f is continuous on its domain D if f is continuous at every point c∈D. Example 1. The function f(x)=ex (with domain R) is continuous on its domain.

Find the slope… and can u explain how u got it.. mark brainliest:)

Answers

Answer:

slope is (1,1) (0,3) just count number of squares, if there was an equation involved use y=mx+b

Step-by-step explanation:

Need help only on 12

Answers

Answer:

y = 3

Step-by-step explanation:

4 (1/2) + y = 10 (1/2)

2 + y = 5

-2 -2

y = 3

Help me - prime factorization of 136

Answers

Answer:

136 = 2³ x 17.

Step-by-step explanation: Factors of 136: 1, 2, 4, 8, 17, 34, 68, 136. Prime factorization: 136 = 2 x 2 x 2 x 17, which can also be written 136 = 2³ x 17.

30 in.
10 in.
10 in.
30 in
20 in
Find the area of the arrow above.
square inches

Answers

Answer:

1100 Inches Squared

Step-by-step explanation:

Let the triangle on the top right be - (i)

Let the triangle on the top left be - (ii)

Let the bottom rectangle be - (iii)

1) The base of the triangle (i) = 10 + (20/2) (It is the base of the rectangle halfed + the given amount of half base of the triangle)

=> 10 + 10

=> 20 in

Base = 20 in

Height = 30 in

Area = 1/2 * 20 * 30

=> 10 * 30

=> 300 in

Triangle (i) = (ii)

So, the area of triangle (ii)

=> 300 in

Area of rectangle,

Length * Breadth

=> 20 * 30

=> 500 in

Total arrow's area = 300 + 300 + 500 (i + ii + iii)

=> 1100

Therefore the total area of the shape = 1100 in squared.

Hope it helps :)

Which equation represents a parabola opening to the right with a vertex at the origin and focus at (9,0) A. X = - 1/36y^2 B. X = - 1/6y^2 C. X = 1/36y^2 D. X = 1/6y^2

Answers

Answer:

Option C: x = (1/36)*y^2

Step-by-step explanation:

A horizontal parabola is written as

x = f(y) =  a*y^2 + b*y + c

If a is positive, the parabola opens to the right.

if a is negative, the parabola opens to the left.

And the vertex of the parabola has the y-value:

y = -b/2a

and the x value

x = f(-b/2a)

For our parabola, we know that:

Opens to the right:

Then the only options left are:

C) x = (1/36)*y^2

D) x = (1/6)*y^2

Because in both cases b = 0, both of the equations have the vertex in the point (0, 0).

Now let's see wich one has a focus at (9, 0)

If the vertex of our equation is:

(h, k)

Then the focus will be:

(h + a, k)

Where a is the directrix of the equation.

Here we know that the vertex is (0, 0) and the focus is (9, 0)

Then:

(0 + a, 0) = (9, 0)

The directrix is 9.

And the directrix is such that:

(x - h)^2 = 4*a*(y - k)

Replacing the values of h and k (both are zero) we get:

x^2 = 4*a*y

And we know that: a = 9

x^2 = 4*9*y

x^2 = 36*y

if we isolate y, we get:

(1/36)*x^2 = y

This is option C.

Then the correct option is C.  

What is the value of 3n +1 when n = 4?
A. 12
B. 13
C. 7
D. 8​

Answers

Answer:

B. 13

Step-by-step explanation:

3(4) + 1 = 13

Answer:

13

Step-by-step explanation:

3n=3x4=12

12+1=13

A gym owner has some purple weights and some white weights. The purple weights are 10 kilograms each, and the white weights are 6 kilograms each. The owner has 12 weights, and they weigh 84 kilograms in all. How many of each colour weight does he have?

Answers

Answer: [tex]3,9[/tex]

Step-by-step explanation:

Given

A gym owner has purple and white weights that measure 10 kg and 6 kg each

respectively.

They weigh 84 kg in total

suppose there x purple and y white weights

[tex]\therefore x+y=12\quad \ldots(i)\\\Rightarrow 10x+6y=84\quad \ldots(ii)\\\\\text{Solving }(i)\ \text{and }(ii)\\\\[/tex]

[tex]x=3,\ y=9[/tex]

Thus, there are 3 purple and 9 white weights.

The equation of the line of best fit is y=3x+2. x=the number of ice cream sales and y= the number of days. Answer the following questions.
Show your work as proof.
a. How many days did it take, if the number of ice cream sales is $40?
b. How much ice cream was sold on the eight day?

Answers

Answer:

all I know is how to get y but y=122

Step-by-step explanation:

y=3(40)+2

y=120+2

y=122

sorry but I dont know what to do for x

What is the value of x?

Answers

Answer:

141°

Step-by-step explanation:

The sum of the internal angles can be calculated using the following formula:

(number of sides - 2) x 180°

This polygon has 7 sides, so (7 - 2) x 180° = 900° total internal angle.

Subtract the other given angles from 900°.

(900 - 131 - 122 - 125 - 148 - 107 - 126)° = 141°

Answer:

x equals 141°

Step-by-step explanation:

The sum of interior angles of this figure is 900°. This was found using the formula (n-2) x 180 where 'n' means number of sides. This figure has 7 sides. So the sum of interior angles would be:-

(7 - 2) x 180°

5 x 180°

= 900°

All the given angles + x gives 900°.

So, to find 'x' we can do the following:-

148° + 125° + 122° + 131° + x° + 126° + 107° = 900°

759 + x = 900

x = 900 - 759

x = 141°

Ok here is the question I need it answered fast I'll give brainliest!

Answers

Answer:

It’s C!!!

Explanation: have an amazing day!

A motorcycle can go 50 miles on 1 gallon of gas. How many gallons will be used to go 150 km? I mile is about 1.6 km. Round to the nearest gallon.

Answers

Answer:

1.875 gallons

Step-by-step explanation:

Data

distance = 50 mi

volume of gas = 1 gal

volume for 150 km = ?

Process

1.- Convert 50 mi into kilometers

                        1 mile ------------------- 1.6 km

                         x        ------------------ 150 km

                         x = (150 x 1)/1.6

                         x = 93.75 mi

2.- Calculate the gallons wasted

                         1 gallon ----------------- 50 mi

                         x            ---------------- 93.75 mi

                         x = (93.75 x 1)/50

                         x = 93.75/50

                        x = 1.875 gallons

Other Questions
summary of The interlopers A highway department is studying the relationship between traffic flow and speed. The following model has been hypothesized. y = 0 + 1x + 2x2 +where y = traffic flow in vehicles per hour x = vehicle speed in miles per hour The following data were collected during rush hour for six highways leading out of the city. Traffic Flow () Vehicle Speed () 1256 35 1330 45 1226 30 1335 50 1349 50 1124 25 a. Use the data to compute the coefficients of this estimated regression equation (to decimals). b. Using , test for a significant relationship. (to decimals) -value (to decimals) The relationship - Select your answer - significant. c. Estimate the traffic flow in vehicles per hour at a speed of miles per hour (to decimals). vehicles per hour. I need help so I can helpl my grandson to pass this quz please and thank youits in the download pdf. Geometry yes yes yes yes yes yes yes yes yes yes 3. What is the breadth of a rectanglewhose length and area are 8cmand 40cm- respectively? State if the triangles in each pair are similar if so state if you know they are similar (please show work if possible) Dustin is riding his bike from Logan, Utah to Jackson Hole, Wyoming in a bike race. He must ride at least 200 miles before he will complete the course. He has already biked 56 3/4 miles.If he can bike roughly 18 5/8 mph, how many more hours will it take him to finish biking at least 200miles? Round your answer to the nearest whole number of hours.Enter your answer as a whole number, like this: 42 Sea turtles, mosquitoes, and frogs all show a A scientist observed this monkey with a minor cut on its face. After one week, the cut had healed and was gone. Explain how this is possible. which organ is central to the body's metabolism of nutrients??a-) the stomachb) the kidneysC) the liverd) the small intestine At which root does the graph of f(x) = (x + 4)(x + 735 cross the x-axis? 4.4s + 6.2 = 8.8s - 1.8please help PLEASE HELP RIGHT NOW!! NO LINKS 7 %of all jails hold over 50% of all prisoners.TrueFalse 2Find the area of the shape.Either enter an exact answer in terms of or use 3.14 for it and enter your answer as a decimal.units? A bag of marbles has 10 red marbles, 4 green marbles, and 6 blue marbles. A marble is randomly drawn from the bag before another marble is drawn, without replacement. What is the probability that a green marble and then a red marble are selected? Enter your answer as a fraction in simplest form in the box. Evaluate w - (w - 8) + v, when w = 11 and v = 16. In database software, which option is the most appropriate menu choice or command to use if you want to change the format of the datefrom January 1, 2020 to 01/01/2020?Print PreviewMail MergeNew RecordAdd/Modify Fields what are the four eaemts match the molecular shapes to the correct Lewis structures trigonal pyramid trigonal planarbenttetrahedral linear