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bezimeni [28]
3 years ago
15

A set of magical wand prices are normally distributed with a mean of 50 dollars and a standard deviation of 4 dollars. A blackth

orn wand has a price of 45.20
Mathematics
1 answer:
Anna11 [10]3 years ago
8 0

Complete Question

A set of magical wand prices are normally distributed with a mean of 50 dollars and a standard deviation of 4 dollars. A blackthorn wand has a price of 45.20. What proportion of wand prices are lower than the price of the blackthorn wand? You may round your answer to four decimal places

Answer:

0.1151

Step-by-step explanation:

We solve using z score formula

z = (x-μ)/σ, where

x is the raw score = $45.20

μ is the population mean = $50

σ is the population standard deviation = $4

We are solving for x < 45.20

Hence:

z = 45.20 - 50/4

z = -1.2

Probability value from Z-Table:

P(x<45.20) = 0.11507

Approximately to 4 decimal places = 0.1151

Therefore, the proportion of wand prices that are lower than the price of the blackthorn wand is 0.1151

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Last season, Ken made 73% of his free throws. If he attempted 59 free throws all season, estimate how many free throws he made.
finlep [7]

Answer:

H 45

Step-by-step explanation:

Given data

Total number of free throws= 59

he made 79%

Hence the number of throws made

=79/100*59

=0.79*59

=46.61

Approximately he made 45 of the throws

4 0
3 years ago
The exponential model A=429e 0.024t describes the​ population, A, of a country in​ millions, t years after 2003. Use the model t
d1i1m1o1n [39]

Answer:

Year 2,590

Step-by-step explanation:

In this question, we are asked to calculate the year at which the population of a country will be a certain amount given the exponential equation through which the equation proceeds.

Let’s rewrite the exponential function;

A = 429e^0.024t

Now here, our A is 559,000,000

t is unknown

Let’s substitute this value of A in the exponential equation;

559,000,000 = 429 * e^0.024t

559,000,000/429 = e^0.024t

1,303,030.303030303 = e^0.024t

Let’s take the logarithm of both sides to base e, we have;

ln(1,303,030.303030303) = ln(e^0.024t)

14.08 = 0.024t

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7 0
4 years ago
Write the word sentence as an inequality.
Alenkinab [10]

Answer:

y ≤ -8

Step-by-step explanation:

4 0
3 years ago
Help me , i will give you points
vovangra [49]

Answer:

some advantages is that you can not pay all at once some disadvantage is that you can feel like you can. do that always then you can get late fees that can cost more the the product it self

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3 years ago
Amanda and her best friend found some money buried in a field. They split the money evenly, each getting $24.28. How much money
Strike441 [17]

Answer:

$48.56

Step-by-step explanation:

24+24=48

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hope it helps

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