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Alexeev081 [22]
4 years ago
10

Out of a total of 300 crayons, 42 are blue. What percent of the crayons are blue?

Mathematics
1 answer:
Rzqust [24]4 years ago
5 0

Answer:

14%

Step-by-step explanation:

42 is divisible of 3, the same with 300, if you put this equation into a fraction (42/300) and divide by 3, you should end up with 14/100 which is equal to 14%.

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An environmental science teacher at a high school with a large population of students wanted to estimate the proportion of stude
AnnZ [28]

Answer:

60 students

Step-by-step explanation:

The confidence interval of a proportion is given by:

p\pm z*\sqrt{\frac{p*(1-p)}{n} }

Where 'p' is the proportion of students who responded 'yes', 'z' is the z-score for a 95% confidence interval (which is known to be 1.960), and 'n' is the number of students in the sample.

If the confidence interval is from 0.584 to 0.816, then:

p=\frac{0.584+0.816}{2}=0.7 \\0.816-0.584=2*(1.96*\sqrt{\frac{p*(1-p)}{n}}) \\0.116=1.96*\sqrt{\frac{0.7*(1-0.7)}{n}}\\n=16.8966^2*(0.7*0.3)\\n=60\ students

60 students were in the sample.

8 0
3 years ago
The highest location in a certain country is 14,864 feet above sea level. The lowest point in the same country is 141 feet below
Radda [10]
15005, just add the two together
5 0
3 years ago
A certain rectangle is 5 times as long as it is wide. Suppose the length and width are both tripled. The perimeter of the second
astraxan [27]
It is tripled as well. You are tripling every distance and thus tripling the sum of the distances as well. 
3 0
4 years ago
Given m/n, find the value of x.
pickupchik [31]

Answer:

x = 152 degrees.

Step-by-step explanation:

The way the 2 angles are positioned indicates that they are corresponding angles.

Corresponding angles are equal.

x = 152 degrees.

Make you know what corresponding angles are and when they can be used. Make sure you also know what parallel lines are (2 or more lines whose distance is a constant). Make sure you also know what a transversal is (a line that crosses the parallel lines).

8 0
2 years ago
The bases of a trapezoid are 11 meters and 14 meters. Its height is 10 meters. What is the area of the trapezoid?
kenny6666 [7]
Area of Trapezoid = (1/2) * (Sum of bases) * height

Area =   (1/2) * (11 + 14) * 10

        =    (1/2) * 25 * 10   =    5 *25 = 125

Area = 125 m²
4 0
4 years ago
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