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Inga [223]
3 years ago
7

Michael can type 80 words in 2 minutes. How many words can he type in 60 minutes?

Mathematics
2 answers:
liubo4ka [24]3 years ago
7 0

Answer:

in an hour (60) minutes, there are 30 sets of two minutes.

in 2 minutes he types 80 words.

30 sets of 2 minutes = 60 minutes

therefore, 30 x 80 = 2400 words

Step-by-step explanation:

Contact [7]3 years ago
6 0

Answer:

2,400 words

Step-by-step explanation:

2 times 30= 60

So 80 times 30= 2,400

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Eleven percent of the pens made by Apex are defective.
sergiy2304 [10]
Let A be the event 'made by Apex and defective':
P(A) = 0.67 x 0.11 = 0.0737
Let B be the event 'made by B-ink and defective':
P(B) = 0.33 x 0.06 = 0.0198
Let C be the event 'made by Apex or B-ink and defective':
P(C) = P(A) + P(B) = 0.0737 + 0.0198 = 0.0935
P(defective and made by Apex) = 0.0737/0.0935 = 0.788
The answer is 0.788 or 78.8%.


3 0
3 years ago
If two samples A and B had the same mean and standard deviation, but sample A had a larger sample size, which sample would have
Advocard [28]
<h3>Answer: Sample B as it has the smaller sample (choice #4)</h3>

===========================================================

Explanation:

Recall that the margin of error (MOE) is defined as

MOE = z*s/sqrt(n)

The sample size n is located in the denominator, meaning that as n gets bigger, the MOE gets smaller. The same happens in reverse: as n gets smaller, the MOE gets bigger.

Put another way, a small sample size means we have more error because small samples mean they are less representative of the population at large. The bigger a sample is, the better estimate we will have of the parameter.

We are told that "sample A had a larger sample size" indicating that sample A has a more narrow confidence interval.

Therefore, sample B would have a wider confidence interval.

This is true regardless of what the confidence level is set at.

7 0
3 years ago
Find the area of each shape by decomposing each shape into rectangle and/or triangle.
avanturin [10]

Remark

You don't have to decompose the second one, and it is better if you don't. Just find the area as you probably did: use the formula for a trapezoid. You have to assume that the 6cm line hits the 2 bases at right angles for each of them, otherwise, you don't know the height. So I'm going to assume that we are in agreement about the second one.

Problem One

The answer for this one has to be broken down and unfortunately, you answer is not right for the total area, although you might get 52 for the triangle. Let's check that out.

<em><u>Triangle</u></em>

Area = 1/2 * b * h

base = 16 cm

h = 10 - 4 = 6

Area = 1/2 * 16 * 6

Area = 48

<em><u>Area of the Rectangle</u></em>

Area = L * W

L = 16

W = 4

Area = L * W

Area = 16 * 4

Area = 64

<em><u>Total Area</u></em>

Area = 64 + 48

Area = 112  of both figures <<<< Answer

3 0
3 years ago
A circle has a radius of 2 feet. Which is the circumference of the circle?
stich3 [128]

Answer:

4pi

Step-by-step explanation:

Circle circumference = 2*pi*r

2*pi*2

4*pi

4 0
2 years ago
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Maria has thirty songs on her ipod, and each songs costs 1.25. If she downloads 25 and 1/2 of a songs, how much money does she h
enot [183]

Answer:

hi

Step-by-step explanation:

3 0
3 years ago
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