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Rainbow [258]
3 years ago
15

Henry and Elizabeth were both baking apple pies for the town fair. Henry bought 2.6 pounds of Honeycrisp apples that cost $2.15

per pound. Elizabeth purchased 3.5 pounds of Granny Smith apples that cost $1.68 per pound. How much more did Elizabeth spend on apples?
Mathematics
1 answer:
Deffense [45]3 years ago
8 0

Answer:

Well if you multiply 3.5 * 1.68 wich is the amount of pounds you get the amount she spent on apples! I hope this is what you need and that this helps!

Step-by-step explanation:

3.5 * 1.68 =5.88

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753% in a decimal form<br> :)
sasho [114]

ANSWER: 7.53

Step-by-step explanation:

To convert a percent to decimal you need to divide the percent by 1,

753% ÷ 1 = 7.53

7 0
3 years ago
There are 48 students in an elementary statistics class. On the basis of years of experience, the instructor knows that the time
Stella [2.4K]

Answer:

a) 64.06% probability that he is through grading before the 11:00 P.M. TV news begins.

b) The hardness distribution is not given. But you would have to find s when n = 39, then the probability would be 1 subtracted by the pvalue of Z when X = 51.

Step-by-step explanation:

To solve this question, we need to understand the normal probability distribution and the central limit theorem.

Normal probability distribution

When the distribution is normal, we use the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

Central Limit Theorem

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean \mu and standard deviation \sigma, the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}.

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

For the sum of n trials, the mean is \mu*n and the standard deviation is s = \sigma\sqrt{n}

In this question:

n = 48, \mu = 48*5 = 240, s = 4\sqrt{48} = 27.71

These values are in minutes.

(a) If grading times are independent and the instructor begins grading at 6:50 P.M. and grades continuously, what is the (approximate) probability that he is through grading before the 11:00 P.M. TV news begins?

From 6:50 PM to 11 PM there are 4 hours and 10 minutes, so 4*60 + 10 = 250 minutes. This probability is the pvalue of Z when X = 250. So

Z = \frac{X - \mu}{\sigma}

By the Central Limit Theorem

Z = \frac{X - \mu}{s}

Z = \frac{250 - 240}{27.71}

Z = 0.36

Z = 0.36 has a pvalue of 0.6406

64.06% probability that he is through grading before the 11:00 P.M. TV news begins.

(b) What is the (approximate) probability that the sample mean hardness for a random sample of 39 pins is at least 51?

The hardness distribution is not given. But you would have to find s when n = 39(using the standard deviation of the population divided by the square root of 39, since it is not a sum here), then the probability would be 1 subtracted by the pvalue of Z when X = 51.

5 0
3 years ago
Express each of the following numbers as a power of two<br><br> (2^3)^4<br><br> 4*4*4*4*4
enot [183]

Answer:

2^12

2^10

Step-by-step explanation:

If you like my answer than please mark me brainliest thanks

6 0
3 years ago
Read 2 more answers
Please help with number 4
Anna35 [415]
Her statue is 20cm because 5ftx12cm is 60ft. therefore the statue should be 60ft in total. 60÷4=20 therefore her drawing is 20cm tall.
7 0
3 years ago
What quadrilateral is created when the properties of a rhombus and a rectangle are combined? a parallelogram a trapezoid a kite
Leto [7]

Answer:

A square

Step-by-step explanation:

Rectangles have 4 parallel sides and rhombi have equal side lengths. A square has same side lengths and 4 parallel sides

4 0
3 years ago
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