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rusak2 [61]
3 years ago
10

Roberto is dividing his baseball cards equally among himsef, his brother, and his three friends. roberto was left with nine card

s. how many cards did roberto giveaway.
Mathematics
1 answer:
icang [17]3 years ago
3 0
36 Cards given away
Roberto has nine so that means everyone else also has nine since they're equal
Therefore
9 cards x 4 other people= 36 cards given
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you have been asked to build a scale model of your school out of toothpicks . Imagine your school is 30ft tall . your scale is 1
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1.26cm/1ft * 30ft = 37.8cm
37.8cm/6.3cm=6
Your model would be six toothpicks tall.
7 0
3 years ago
(26.6.1) Which of the following is an example of perpendicular lines?
Otrada [13]

Answer:

A.

Step-by-step explanation:

The hands on the clock at 9.00

6 0
3 years ago
You are curious about the average number of yards Matthew Stafford throws for each game for the Detroit Lions. You randomly sele
Damm [24]

Answer:

The margin of error for this estimate is of 14.79 yards per game.

Step-by-step explanation:

We have the standard deviation for the sample, which means that the t-distribution is used to solve this question.

T interval

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 20 - 1 = 19

95% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 19 degrees of freedom(y-axis) and a confidence level of 1 - \frac{1 - 0.95}{2} = 0.975. So we have T = 2.093

The margin of error is:

M = T\frac{s}{\sqrt{n}}

In which s is the standard deviation of the sample and n is the size of the sample.

You randomly select 20 games and see that the average yards per game is 273.7 with a standard deviation of 31.64 yards.

This means that n = 20, s = 31.61

What is the margin of error for this estimate?

M = T\frac{s}{\sqrt{n}}

M = 2.093\frac{31.61}{\sqrt{20}}

M = 14.79

The margin of error for this estimate is of 14.79 yards per game.

3 0
3 years ago
A recipe for making 3 dozen muffins requires 1 1/2 cups of flour. How many cups of flour are required to make 5 dozen of the sam
Scilla [17]

Answer:

2 1/2 cups

Step-by-step explanation:

3 dozen muffins = 1 1/2 cups

divided by 3, you get 1 dozen muffins = 1/2 cup of flour

multiply by 5 you get 2 1/2 cups of flour

7 0
3 years ago
The number of camera phones shipped globally can be modeled by the function y = 1.28e 1.31x where x is the number of years since
OlgaM077 [116]

Answer: 895 phones

Step-by-step explanation:

Given that :

The function : y = 1.28e^1.31x ; is used to model the number of camera phones shipped since 1997

y = number of camera phones ; x = number of years since 1997

The number of camera phones shipped in the year 2002 can be obtained thus ;

x = 2002 - 1997 = 5 years

y = 1.28e^(1.31 * 5)

y = 1.28e^6.55

y = 1.28(699.24417)

y = 895.03254

y = 895 phones

3 0
3 years ago
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