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2 years ago

Let ∠X and ∠Y be complementary. If sin(X) = 3/5

Mathematics

2 answers:

PtichkaEL [24]2 years ago

5 0

Answer:

answer is B.

Step-by-step explanation:

statuscvo [17]2 years ago

4 0

Since they are complementary
x + y = 90

Sin(o) = Cos (90-0)

Therefore, Cos x = Sin y = 4/5 [ Because x and y are complementary]

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Twenty five heat lamps are connected in a greenhouse so, that when one lamp fails, another takes over immediately (only one lamp

olga55 [171]

Answer:

P = 0.006

Step-by-step explanation:

Given

n = 25 Lamps

each with mean lifetime of 50 hours and standard deviation (SD) of 4 hours

Find probability that the lamp will be burning at end of 1300 hours period.

As we are not given that exact lamp, it means we have to find the probability where any of the lamp burning at the end of 1300 hours, So we have

Suppose i represents lamps

P (∑i from 1 to 25 ( $X_i$ > 1300)) = 1300

= P( $X^{'}$ > $\frac{1300}{25}$ ) where $X^{'}$ represents mean time of a single lamp

= P (Z> $\frac{52-50}{\frac{1}{\sqrt{25}}}$ ) Z is the standard normal distribution which can be found by using the formula

Z = Mean Time ( $X^{'}$ ) - Life time of each Lamp (50 hours)/ (SD/ $\sqrt{n}$ )

Z = (52-50)/(4/ $\sqrt{25}$ ) = 2.5

Now, P(Z>2.5) = 0.006 using the standard normal distribution table

Probability that a lamp will be burning at the end of 1300 hours period is 0.006

4 0

3 years ago

Write the ratio two fifths to 8 as a fraction in simplest form. PLEASE HELP

charle [14.2K]

Answer:

the answer is b on oddesseyware

Step-by-step explanation:

7 0

3 years ago

joey gets hired with a $100 signing bonus for a job that makes $15 an hour. Sarah does not get a singing bonus but makes $17 an

KATRIN_1 [288]

The only difference I see is that he would have money so...

8 0

2 years ago

You picked one marble out of a bag that contains 6 red marbles, 5 white marbles, and 3 blue marbles. Find p(red and blue).

Tcecarenko [31]

Answer: p=9
explanation: 6 reds + 3 blues = 9.

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2 years ago

Find the missing side 13 ft 5 ft x

Scilla [17]

Answer:

Assuming you're referring to the sides of a right triangle, the missing side X would be 12.

Step-by-step explanation:

The Pythagorean Theorem states that the two legs of a right triangle squared and added together is equal to the hypotenuse squared. $13^{2}$ is 169, $5^{2}$ is 25, 169 - 25 = 144. Take the square root of 144 and you'll get 12, which is the missing side of the right triangle.

5 0

2 years ago