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Darya [45]
3 years ago
11

Suppose a study estimated that 63% of the residents of a community (with an

Mathematics
1 answer:
Anvisha [2.4K]3 years ago
3 0

Answer:

Answer choice A(57%)

Step-by-step explanation:

The margin of error is 7%. This means the 63% could either 7% too high or 7% too low. Answer choice A is the only answer choice that is within the range of percents that it could possibly be(between 56% and 70%). Answer choice B is 10% off, 3% out of the range. Answer choice C is 25% off, 18% out of the range. Answer choice D is 32% off, 24% out of the range. Hope this helps. :)

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A 150 cm pendulum swings through an arc which measured 100pi cm. In exact radians, through what angle does it swing?
choli [55]

Answer:

Pendulum will swing by an angle 0.666π

Step-by-step explanation:

We have given arc = 100\pi cm

And length of the pendulum l = 150 cm

Length of the pendulum will be equal to radius of the pendulum so r = 150 cm

Arc is given by arc=radius\times angle

So 100\pi =150\times\times  \Theta

\Theta =0.666\pi

So pendulum will swing by an angle 0.666π

5 0
3 years ago
1st answer gets brainliest!!!
Nastasia [14]
The apothem of this is 13
7 0
3 years ago
1.3n-0.03=-9 (solve for n) grade lvl. 7
bazaltina [42]

Hello from MrBillDoesMath!

Answer:

-6.9


Discussion:  

1.3n - 0.03 = -9     =>              multiply both sides by 100

130n - 3 = -900 =>

130n = -900 +3 =  -897 =>     add 3 to both sides

n = -897/130  =>

n =  - (69 * 13)/ (10*13) =>

n = - 69/10 = - 6.9




Thank you,

MrB

4 0
3 years ago
Autumn drives 825 miles to Florida. The trip takes her 17 hours. She uses 38 gallons of gas on the trip, which cost her $125. Fi
Dmitry [639]
speed \: equals \: distance \div time
speed equals 825 divided by 17
speed equals to 48.5miles per hour

gas mileage equals to 825/38
gas mileage equals to 21.7


125/38 equals to 3.3 unit price
8 0
3 years ago
A square has an area of 148.84m2.<br> Work out the perimeter of the square
Lemur [1.5K]

Answer:

48.8m

Step-by-step explanation:

Formula for square area = a^{2} = 148.84 m^{2}

=> a = \sqrt{148.84} = 12.2

Formula for square perimeter = 4a = 4 x 12.2 = 48.8 m

8 0
2 years ago
Read 2 more answers
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