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
Brrunno [24]
3 years ago
9

The wattage rating of an appliance is given as W, in watts, and varies jointly as the resistance, R, in ohms, and as the square

of the current, I, in amperes. If the wattage is 90 watts when the resistance is 250 ohms and the current is 0.6 amperes, find the wattage when the resistance is 300 ohms and the current is 0.2 amperes.
A. 18,000 watts
B. 120 watts
C. 12 watts
D. 60 watts
Mathematics
1 answer:
Olin [163]3 years ago
3 0

Answer:

12 W

Step-by-step explanation:

Taking first case to establish the value of k

Substituting W with 90,  I with 0.6 and R with 250 then

Now when resistance is 300 and current 0.2 then

W= 1\times 300\times 0.4^{2}

You might be interested in
2) Lucy spent $15, 500 to purchase a new car this year. Lucy can expect her car to depreciate at a rate of 7% per year.
Lelechka [254]

Answer:

<u>Equation: V = C * (1 - r)^t</u>

<u>Answer: $ 8,066.37</u>

Step-by-step explanation:

Let's recall that depreciation on a car can be determined by the formula:

V = C * (1 - r)^t , where:

V is the value of the car after t years,

C is the original cost

r is the rate of depreciation

t is the number of years of utilization of the car

Therefore, we have:

V = C * (1-r)^t

V = 15,500 * (1 - 0.07)⁹

V = 8,066.37 (rounding to the next cent)

5 0
3 years ago
Identify the coefficients in the following expression.<br> -7x + 8y - 3z + y - 9
irina1246 [14]
The coefficients are -7, 8, -3, 1, and -9
5 0
3 years ago
Read 2 more answers
If ac =14 find the value of x then find ab and bc
Igoryamba

Answer:

If B is between A and C, AB = x, BC = 2x + 2, and AC = 14, find the value of x. Then find AB and BC.

Step-by-step explanation:

AB=x

BC = 2x + 2BC=2x+2

AC =14AC=14

Required

Determine x, AB and BC.

Since B is between A and C;

AB + BC = ACAB+BC=AC

Substitute x for AB; 2x + 2 for BC and 14 for AC

x + 2x + 2 = 14x+2x+2=14

3x + 2 = 143x+2=14

Collect Like Terms

3x = 14 - 23x=14−2

3x = 123x=12 '

x = \frac{12}{3}x=

3

12

x = 4x=4

Substitute 4 for x in

AB = xAB=x

BC = 2x + 2BC=2x+2

AB = 4AB=4

BC = 2(4) + 2BC=2(4)+2

BC = 8 + 2BC=8+2

BC = 10BC=10

3 0
2 years ago
PLEASE HELP!!!!!!!!!!! Kim wants to know if the number of words on a page in her math book is generally more than the number of
omeli [17]

It's D, because the mean doesn't matter as much if it's only taken in a small variability. The mean was selected from 25 random pages in the book, that is why it is right.

4 0
4 years ago
Read 2 more answers
Please help me asap with number 20 and explain please
kow [346]

Answer:

c

Step-by-step explanation:

because it is increasing exponentially

6 0
3 years ago
Other questions:
  • Order numbers from least to greatest 21/2,-7.5,-36/5,9.5
    15·1 answer
  • Evaluate: 3(2f - g) + 4h for f = 2, g = -1 and h = 3
    12·2 answers
  • Write an equation of the line, in point slope form, that passes through the two given points.
    9·1 answer
  • My lawn is 17ft wide and 20ft long, each square foot of lawn gets 1350 new snowflakes per min how much snow in kilograms accumul
    11·1 answer
  • Sarah drove 40 miles per hour. In 3 hours, Sarah drove 120 miles. Which is a valid proportion to represent this description?
    8·1 answer
  • Answer to any question will be appreciated. If you can please explain to me how you got the answer :)
    7·1 answer
  • Average movie prices in the United States​ are, in​ general, lower than in other countries. It would cost ​$78.23 to buy three t
    7·1 answer
  • 3. Look at the map. Explain why Elm Street and Birch Street are not perpendicular.
    14·1 answer
  • Helppppp
    11·1 answer
  • What is d + 6 / -2 = 5 the slash is a fraction
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!