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Bezzdna [24]
3 years ago
7

A sixth grade teacher can grade 40 math assignments in 20 minutes. How many assignments can she grade in 1 minute?

Mathematics
2 answers:
Furkat [3]3 years ago
6 0

Answer:

2 assignments per minute

Step-by-step explanation:

Divide

20 / 40 = 0.5 minutes per assignment

Divide.

1 / 0.5 = 2

Best of Luck!

Artyom0805 [142]3 years ago
3 0

Answer:

0.5 assignments (or 1 grade per 2 minuites)

Step-by-step explanation:

20/40 is 0.5

( / is division)

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An air transport association surveys business travelers to develop quality ratings for transatlantic gateway airports. The maxim
Flura [38]

Answer:

The 95% confidence interval estimate of the population mean rating for Miami is (6.0, 7.5).

Step-by-step explanation:

The (1 - <em>α</em>)% confidence interval for the population mean, when the population standard deviation is not provided is:

CI=\bar x \pm t_{\alpha/2, (n-1)}\cdot \frac{s}{\sqrt{n}}

The sample selected is of size, <em>n</em> = 50.

The critical value of <em>t</em> for 95% confidence level and (<em>n</em> - 1) = 49 degrees of freedom is:

t_{\alpha/2, (n-1)}=t_{0.05/2, 49}\approx t_{0.025, 60}=2.000

*Use a <em>t</em>-table.

Compute the sample mean and sample standard deviation as follows:

\bar x=\frac{1}{n}\sum X=\frac{1}{50}\times [1+5+6+...+10]=6.76\\\\s=\sqrt{\frac{1}{n-1}\sum (x-\bar x)^{2}}=\sqrt{\frac{1}{49}\times 31.12}=2.552

Compute the 95% confidence interval estimate of the population mean rating for Miami as follows:

CI=\bar x \pm t_{\alpha/2, (n-1)}\cdot \frac{s}{\sqrt{n}}

     =6.76\pm 2.000\times \frac{2.552}{\sqrt{50}}\\\\=6.76\pm 0.722\\\\=(6.038, 7.482)\\\\\approx (6.0, 7.5)

Thus, the 95% confidence interval estimate of the population mean rating for Miami is (6.0, 7.5).

7 0
2 years ago
What type of polynomial is this
Crank

Answer:

trinomial..............

5 0
2 years ago
WHOEVER ANSWERS CORRECTLY I'LL GIVE BRAINLIEST!!!!!!!!!!!
aleksandr82 [10.1K]

Answer:

\frac{1}{125}

Step-by-step explanation:

5^{-3}= \frac{1}{5^{3}} =\frac{1}{125}

6 0
2 years ago
Read 2 more answers
A is the point with coordinates (-2,d) B is the point with coordinates (4,15) The line AB has gradient 1/2 Work out the value of
anygoal [31]

Answer:

d=12

Step-by-step explanation:

15-d/4+2=1/2

15-d/6=1/2

2(15-d)=6

30-2d=6

30-6=2d

24=2d

d=12

6 0
2 years ago
Suppose that $3500 is placed in an account that pays 2% interest compounded each year. Assume that no withdrawals are made from
Burka [1]
1% of $3500 is $35

Double that means

2% is $70

So first year would be $3570

Now

1% of $3570 is $35.70
2% is $71.40

So second year would be

$3641.40
7 0
2 years ago
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