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stealth61 [152]
3 years ago
14

Ms.Bass gave her class 12 minuets to read. Carrie read 5 1/2 pages in that time. At what rate, in pages per hour, did Carrie rea

d? #PLZHELP
Mathematics
1 answer:
Talja [164]3 years ago
6 0

So, we have

5.5/12

Convert to a denominator of 60, since there are 60 mins in an hour

60/12= 5

Multiply numerator and denominator by 5

5*5.5= 27.5

12*5= 60

So our answer is 27.5/60 or 27.5 pages an hour

I hope this helps :)              

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Evaluate<br> 8a-b<br> if a = 10 and b= 6
solniwko [45]

Answer:

74

Step-by-step explanation:

(8x10) - 6 =

80 - 6 = 74

4 0
1 year ago
Compared to its 'parent' function f(x)=x^2, describe the changes if f(x)=-x^2-3?
zimovet [89]

Answer:

it opens down meaning it has a maximum instead of a minimum. the graph has a horizontal shift of 3 spaces to the right

Step-by-step explanation:

6 0
3 years ago
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Taya2010 [7]

Answer:

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6 0
2 years ago
The American Bankers Association reported that, in a sample of 120 consumer purchases in France, 48 were made with cash, compare
tatuchka [14]

Answer:

Step-by-step explanation:

Hello!

You have the information for two variables

X₁: Number of consumer purchases in France that were made with cash, in a sample of 120.

n₁= 120 consumer purchases

x₁= 48 cash purchases

p'₁= 48/120= 0.4

X₂: Number of consumer purchases in the US that were made with cash, in a sample of 55.

n₂= 55 consumer purchases

x₂= 24 cash purchases

p'₂= 24/55= 0.4364

You need to construct a 90% CI for the difference of proportions p₁-p₂

Using the central limit theorem you can approximate the distribution of both sample proportions p'₁ and p'₂ to normal, so the statistic to use to estimate the difference of proportions is an approximate standard normal:

[(p'₁-p'₂) ± Z_{1-\alpha /2} * \sqrt{\frac{p'_1(1-p'_1)}{n_1} +\frac{p'_2(1-p'_2)}{n_2} }]

Z_{0.95}= 1.648

[(0.4-0.4364)±1.648 * \sqrt{\frac{0.4(1-0.4)}{120} +\frac{0.4364(1-0.4364)}{55} }]

[-0.1689;0.0961]

The interval has a negative bond, it is ok, keep in mind that even tough proportions take values between 0 and 1, in this case, the confidence interval estimates the difference between the two proportions. It is valid for one of the bonds or the two bonds of the CI for the difference between population proportions to be negative.

I hope this helps!

8 0
3 years ago
The ability to find a job after graduation is very important to GSU students as it is to the students at most colleges and unive
sergejj [24]

Answer:

Step-by-step explanation:

Using the formula

p +/- z* √(p(1-p) / n)

Where p is sample proportion = 3226/3957 = 0.8153, n = 3957 and z* is 2.576

0.8153 + (2.576 √(0.8153(1-0.8153) / 3957))

0.8153 + (2.576 √ (0.8153(0.1847) /3957)

0.8513 + (2.576 √(0.1572/3957)

0.8513 + (2.576 √0.00003974)

0.8513 + 2.576(0.0063)

0.8513 + 0.016

0.8670 ~ 87%

For the lower interview

0.8513 - 0.016

= 0.8353 ~ 84%

Thus, at 99% confidence interval is 84% and 87%

7 0
3 years ago
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