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Ivan
3 years ago
13

Sorry it's in black and white but i need help with 3a. b. c. and 4

Mathematics
1 answer:
Andrews [41]3 years ago
4 0
It s for a is 20 1in for b it is 36 and for
c

its 50
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A room has three lightbulbs. Each one has a 30% probability of burning out within the month. Write the probability as a percenta
lesantik [10]

Answer:

97.3%

Step-by-step explanation:

Let the three bulbs be A, B and C respectively.

Let P(A) denote the probability that the first bulb will burn out

Let P(B) denote the probability that the second bulb will burn out

Let P(C) denote the probability that the third bulb will burn out

Now, we are told that Each one has a 30% probability of burning out within the month.

Thus;

P(A) = P(B) = P(C) = 30% = 0.3

Now, probability that at the end of the month at least one of the bulbs will be lit will be given as;

P(at least one bulb will be lit) = 1 - (P(A) × P(B) × P(C))

P(at least one bulb will be lit) = 1 - (0.3 × 0.3 × 0.3) = 0.973 = 97.3%

3 0
3 years ago
A rectangle is four times as long as it is wide. The perimeter is 40 cm. Find the length of each side.
rjkz [21]

Answer:

W=4 l=16

Step-by-step explanation:

Let w = width

Let l = length

Since the length is 4 times the width, l=4w

Perimeter of rectangle = 2l + 2w

= 2(4w)+2w

=10w

The perimeter of the rectangle =40, so

40=10w and w=4

Plug w into the length equation : l=4w=4(4)=16

6 0
3 years ago
Write the Equation of the conic.
tigry1 [53]

Answer:

(x² -1) + y² = 9

Step-by-step explanation:

diameter=6 so radius means 6/2=3 (thus,radius²=3²=9)

centre (1 and midpoint of diameter is at y=0, so 1,0)

3 0
2 years ago
Order the numbers from greatest to least.<br> 332 233 323
Hitman42 [59]

Answer:

Step-by-step explanation:

332 323 233

4 0
3 years ago
Read 2 more answers
2. ROLLERCOASTER At a theme park, a person must be a certain height to ride a
GuDViN [60]

Answer:

Both Anoki and David are correct. Both expressions are equivalent to the difference between the measurements and are always positive because they give the absolute value of the difference.

Sorry for answering so late.

Step-by-step explanation:

8 0
3 years ago
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