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Fed [463]
3 years ago
15

Venessa has scored 45 32 and 37 on her three math quizez she will take one more quiz and she wants a quiz average of at least 40

what is the minnimum score vennesa needs to earn on her fourth quiz
Mathematics
1 answer:
madreJ [45]3 years ago
6 0

\frac{45 + 32 + 37 + x}{4}  = 40 \\ x = 46
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When estimated, is 6.2-4.96 greater or less than 1?
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What is the value of -2/5 divided by 6/8 PLEASE HELPPP
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Answer:

The steps to do :

- \frac{2}{5}  \div  \frac{6}{8}

=  -  \frac{2}{5}  \times  \frac{8}{6}

=  -  \frac{1}{5}  \times  \frac{8}{3}

=  - \frac{1 \times 8}{5 \times 3}

=  -  \frac{8}{15}

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3 years ago
The amount of calories consumed by customers at the Chinese buffet is normally distributed with mean 2885 and standard deviation
aliina [53]

Answer:

a.  X~N(2,885, 651)

b.  0.086291

c.  0.00058

d.  3213.10 calories

Step-by-step explanation:

a. -A normal distribution is expressed in the form X~N(mean, standard deviation).

-Let X a random variable denoting  the number of calories consumed.

-X is a is a normally distributed random variable with mean 2885 and standard deviation 651.

-This distribution is expressed as X~N(2,885, 651)

b. The probability that less than 2000 calories are consumed is calculated using the formula:

P(X

#substitute the given values in the formula to solve for P:

P(X

Hence, the probability of consuming less than 2000 calories is 0.08691

c. The proportion of customers consuming more than 5000 calories is calculated as:

P(X>x)=P(z>\frac{\bar X-\mu}{\sigma})\\\\=P(Z>\frac{5000-2885}{651})\\\\=P(z>3.2488)\\\\=1-0.99942\\\\=0.00058

Hence, the proportion of customers consuming over  5000 calories is 0.00058

d. The least amount of calories to get the award is calculated as:

1% is equivalent to a z value of 0.50399.

-We equate this to the formula to solve for the mean consumption:

0.01=P(z>\frac{\bar X-\mu}{\sigma})\\\\=P(z>\frac{\bar X-2885}{651})\\\\\1\%=0.50399 \\\\\frac{\bar X-2885}{651}=0.50399 \\\\\bar X=0.50399\times 651+2885\\\\=3213.09

Hence, the least amount of calories consumed to qualify for the award is 3213.10 calories.

8 0
3 years ago
-9h - 15 = 93<br> What is the answer to this?
Svetlanka [38]

-9h = 93 + 15

-9h = 108

h =-12

3 0
2 years ago
Read 2 more answers
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