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Marat540 [252]
3 years ago
8

Suppose a normal distribution has a mean of 50 and a standard deviation of 3. What is P(x≤53)?

Mathematics
1 answer:
Vera_Pavlovna [14]3 years ago
5 0

Answer:

Step-by-step explanation:

Use the formula to find the z-score, then go to the table that will give you the probability that the value is less than this z-score.

z=\frac{53-50}{3}=1

The probability that the value lies to the left of 1 on a standard bell curve is 84.1345%, or 84%, the third choice down.

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Hey, could someone please help me with this? Thanks.
Novosadov [1.4K]

Answer:

Part A: 1. (1, 0.5) 2. (2, 1) 3. (3, 1.5) 4. (4, 2) 5. (5, 2.5) 6. (6, 3)

Part B: Yes, this relation is in fact a function.

Part C: No, it would not be a function.

Step-by-step explanation:

Part A: Well, you start at 1 hr. right? yes. So then, at the very beginning at the problem, it says the candle burns at the rate of 0.5 in. per hour. So for 1 hour, the candle will burn .5 inches. At 2 hours, it will burn off 1 whole inch.

Part B:  1 hr. = .5 in. burn,  2 hrs. = 1 in. burns,  3 hrs. = 1.5 in. burns,  4 hrs. = 2 in. burns,  5 hrs.= 2.5 in. burns, 6 hrs. = 3  in. burns.

Part C:  1 hr.= .45 in. burn, 2 hrs. = .9 in burn,  3 hrs. = 1.35 in. burns, 4 hrs. = 1.8 in. burns, 5 hrs. = 2.25 in. burns, 6 hrs. = 2.7 in. burns.    It does not go at a constant rate. The number of inches are all over the place.

Hope this helps you out!! (:

4 0
3 years ago
Expand the function f(x)=(x+5)^3
Fudgin [204]

Answer:

(x-5)^3

Step-by-step explanation:

(x-5)^3. (x−5)3 ( x - 5 ) 3

5 0
2 years ago
Mario walked 3/4 mile to school and he walked back home. Then he walked 2/3 miles to the store and back home. How far did Mario
larisa86 [58]
2 5/6 miles is the answer to the question
6 0
3 years ago
A clothing store paid an import tax of $32 on a shipment of $800 worth of silk scarves. The import tax rate is always the same.
bekas [8.4K]
This will be your formula:
\frac{32}{800}  =  \frac{120}{x}
cross multiply (32 times x) (120 times 800)
this is what you'll get:

4 0
3 years ago
PLS HELP ASAP
Anna007 [38]
Use math-way!!!!!!! I promise you won’t need to waist your points.%
7 0
2 years ago
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