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vlada-n [284]
3 years ago
7

Mrs. Lynch has noted that 7 out of every 10 pieces of mail she gets are junk mail. What percent of her mail is junk?

Mathematics
2 answers:
-BARSIC- [3]3 years ago
8 0
I think it would be 70% of her mail
VikaD [51]3 years ago
5 0

Answer:

70%

Step-by-step explanation:

Any thing out of ten would be any ten out of a hundred. Just move the decimal back two places and you get 70%

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A survey was done that asked people to indicate whether they preferred running outdoors or running indoors. The results of the s
ser-zykov [4K]

Answer:

Option A. Divide 382 by 1027.

Step-by-step explanation:

A survey was done about the people who preferred running indoors and outdoors. Then a two way table was prepared.

Amir is making a relative frequency table.

As we know relative frequency table is prepared by the dividing number of frequency by the total number of students taken in the sample.

Now he will take the data from the given two way table.

People age 30 years and younger were 382 running outdoors and 105 running indoor.

So people having age 30 and below are 382 + 105 = 487

Similarly people Over 30 years old running outdoor and indoor = 299 + 241 = 541

Now Total number of people taken in the sample = 487 + 541 = 1027

So relative frequency for the people of age 30 and younger will be

382/1027 for outdoor and 105/1027 for indoor.

Therefore answer will be Option A. Divide by 382/1027.

3 0
3 years ago
Please help me!!!!!!!!!!
PolarNik [594]
Just divide the arc the inscribe angle forms by 2.  So 100/2 = 50 = a, and b is 55.
4 0
4 years ago
Read 2 more answers
M^2 - 4m +8 = -21 <br> Solve the quadratic equation by completing the square
pshichka [43]

Answer:

m^2-4m=-29

m^2-4m+4=-29+4

(m-2)^2=-25

m=2+-5i

6 0
3 years ago
Judy bought 20 apples at the store, and the total weight was 2 kilograms. If the apples all had about the same weight, how much
chubhunter [2.5K]

Answer:

200 grams

Step-by-step explanation:

4 0
3 years ago
In a certain state, there are currently 5,902,060 acres of farmland. This area is decreasing at a rate of 4.3% every year. Selec
Luba_88 [7]

Answer:

y=5,902,060*(.957)^t

Step-by-step explanation:

Since the original amount would be decreasing and it's an exponential one, hence the "every year", we can determine that it's an exponential decay equation.

The exponential delay equation is y=A*(1-r)^t. The y is the remaining amount, A is the original amount, r is the rate in decimal form, and t is for years. "1-r" is for decreasing rates and "1+r" is for increasing rates.

First thing we need to do is turn the rate, 4.3%, from a percentage to a decimal. You can do this by moving the decimal two places to the right, which gives you 0.043.

Now plug the numbers into the equation.

y=5,902,060*(1-0.043)^t

Simplify what's inside the parenthesis and get your final equation.

y=5,902,060*(.957)^t

3 0
3 years ago
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