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4 years ago

Incandescent lights operate at the same wattage as fluorescent lights to give out same amount of light.

Mathematics

2 answers:

vovangra [49]4 years ago

8 0

I think the answer is false.

vekshin14 years ago

3 0

That's false. Fluorescent lights are more efficient, and so a lower-wattage fluorescent light will produce the same amount of light as a higher wattage incandescent. Less energy is lost in the electric power to light conversion.

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Identify the terms and coefficients of 4a + 6b squared

adoni [48]

The terms would be 4a and another would be 6b squared.
The coefficient (a number or quantity placed before the variable, which is the letter) of 4a is 4. The coefficient of 6b squared would be 6

8 0

3 years ago

The fundraising group collected the quarters from the school's wishing well. The group arranged the quarters into 8 piles and of

Mariulka [41]

8•20=q. Multiply the number of piles by the number of quarters in each pile: 8•20=160, there were 160 quarters. Now to find how much they made multiply the number of quarters by how much 1 quarter is: 160•.25=40 they made $40 :)

7 0

3 years ago

You are playing a game where you flip 3 coins, if you get all tails you lose $15, for each heads you get $3. What is your expect

UkoKoshka [18]

Answer:

expected profit=$-3

Step-by-step explanation:

1 tail=-5

1 head=3

3/2=1.5

1.5*3=4.5

1.5*-5=-7.5

4.5-7.5=-3

$-3

6 0

2 years ago

Suppose that the probability that it rains on Friday is 80% and the probability that it rains on Saturday is 70%, and the event

zzz [600]

Answer:

0.06 (6%)

13.31

0.2266

Step-by-step explanation:

Given that :

Probability that it rains on Friday ; P(FR) = 0.8

Probability that it rains on Saturday ; P(SR) = 0.7

P(FR) and P(SR) are independent events

Probability that it does not rain on Friday ; P(FR)' = 1 - P(FR) = 1 - 0.8 = 0.2

Probability that it does not rain on Saturday ; P(SR)' = 1 - P(SR) = 1 - 0.7 = 0.3

Hence, probability that it does not rain on Friday and on Saturday ;

P(FR)' * P(SR)' = 0.2 * 0.3 = 0.06 = 0.06 * 100% = 6%

Given the scores :

82, 73, 61, 97, 83 ;

The sample standard deviation :

Sqrt(Σ(X - m)^2 ÷ n - 1)

n = sample size = 5

m = mean = ΣX / n

m = (82 + 73 + 61 + 97 + 83) / 5 = 79.2

Sqrt((82 - 79.2)^2 + (73 - 79.2)^2 + (61 - 79.2)^2 + (97 - 79.2)^2 + (83 - 79.2)^2) / (5 - 1)

Sqrt(177.2) = 13.311649

Hence, standard deviation = 13.31

3.)

Given that :

Mean(m) = 120

Standard deviation (s) = 20

Probability that randomly taken test taker scores less than 105

P(x < 105)

Obtain the standardized score :

Z = (x - m) / s

Z = (105 - 120) / 20

Z = - 15 / 20

Z = - 0.75

P(Z < - 0.75) = 0.22663 (Z probability calculator)

= 0.2266

6 0

3 years ago

Question 3

Scilla [17]

Answer:

See Explanation

Step-by-step explanation:

The question is incomplete, as the vertices of the triangles is missing.

However, the following formula can be used to calculate distance;

$d = \sqrt{(x_1 - x_2)^2 + (y_1 - y_2)^2}$

Take for instance:

$A = (1,8)$

$A' = (7,8)$

The distance between both is:

$d = \sqrt{(1- 7)^2 + (8- 8)^2}$

$d = \sqrt{(-6)^2 + 0^2}$

$d = \sqrt{36 + 0}$

$d = \sqrt{36}$

Take square root

$d = 6$

<em>Apply the above steps to the complete question</em>

6 0

3 years ago