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Stella [2.4K]
3 years ago
6

Solve and simplify: 4 1/2 x 2 1/3 A.9/2 B.7/3 C.63/6 D.10 1/2

Mathematics
2 answers:
vichka [17]3 years ago
6 0

Answer:

The answer is D. 10 1/2

Step-by-step explanation:

igor_vitrenko [27]3 years ago
5 0

Answer: 10 1/2

Step-by-step explanation:

Convert all mixed numbers into improper fractions

4 1/2 = 9/2

2 1/3 = 7/3

Now multiply 9/2 * 7/3

9*7=63

2*3=6

Get 63/6

Divide 63 and 6 and get 10.5

10.5 will equal to 10 1/2

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Suppose a certain species of fawns between 1 and 5 months old have a body weight that is approximately normally distributed with
worty [1.4K]

Answer:

z

Step-by-step explanation:

Assuming this complete question:

"Suppose a certain species of fawns between 1 and 5 months old have a body weight that is approximately normally distributed with mean \mu =26 kilograms and standard deviation \sigma=4.2 kilograms. Let x be the weight of a fawn in kilograms. Convert the following z interval to a x interval.

X"

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

Solution to the problem

Let X the random variable that represent the weights of a population, and for this case we know the distribution for X is given by:

X \sim N(26,4.2)  

Where \mu=26 and \sigma=4.2

And the best way to solve this problem is using the normal standard distribution and the z score given by:

z=\frac{x-\mu}{\sigma}

We know that the Z scale and the normal distribution are equivalent since the Z scales is a linear transformation of the normal distribution.

We can convert the corresponding z score for x=42.6 like this:

z=\frac{42.6-26}{4.2}=3.95

So then the corresponding z scale would be:

z

7 0
2 years ago
Elijah gets paid $15.50 per hour in addition to a weekly salary of $50. This week he wants to earn more than $400. How many hour
8090 [49]
H=number of hours
m=total salary
m=15.50h+50
put 400 in for m
400=15.50h+50
now solve for h
400=15.50h+50
-50. -50
350=15.50h
Divide 350 by 15.50to get your final answer
you get a long decimal so I rounded it.
22.6 hours
4 0
3 years ago
in a week karry ran 9.3 miles and Tricia ran 4.4 miles. Use mental math to find how much farther Karry ran than Tricia. Explain
Ede4ka [16]

i would just round 9.3 to 9 and 4.4 to 4 so i subtract 9-4 so that equals 5 so about a 5 mile diffrence

6 0
3 years ago
Read 2 more answers
Can you solve the 3 questions below?
trasher [3.6K]

Answer:

a - car

b - plane b

10 overs

6 0
3 years ago
0.4 x 10 =....<br>1.25 x 10 = <br>97.465 x10 =​
chubhunter [2.5K]

Answer:

0.4 × 10 = 4

1.25 × 10 = 12.5

97.465 × 10 = 974.65

3 0
3 years ago
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