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3 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?

1 answer:

4 0

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

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3 years ago

Describe the pattern for the powers of 10. Write the values of 10*1and 10*0<br> in the table.

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2 years ago

What is the scientific notation for 140000

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You move the decimal point forward until it reaches the one so it looks like this:

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3 years ago

The sum of two numbers is 39. The sum of twice the larger number and three times the smaller number is 93. Find the smaller numb

ExtremeBDS [4]

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Step-by-step explanation:

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3 years ago

Assume that 33.4% of people have sleepwalked. Assume that in a random sample of 1459 adults, 526 have sleepwalked.

lutik1710 [3]

Answer:

Step-by-step explanation:

Given that 33.4% of people have sleepwalked.

Sample size n =1459

Sample favourable persons = 526

Sample proportion p = $\frac{526}{1459} \\=0.361$

Sample proportion p is normal for large samples with mean = 0.334 and

std error = $\sqrt{\frac{pq}{n} } \\=\sqrt{\frac{0.334(1-0.334)}{1459} } \\=0.0123$

a) P(526 or more of the 1459 adults have sleepwalked.)

$=P(p\geq 0.361)\\=P(Z\geq \frac{0.361-0.334}{0.0123} \\=P(Z\geq 2.20)\\=0.5-0.4861\\=0.0139$

b) Yes, because hardly 1.4% is the probability

c) 33.4 is very less compared to the average. Either sample should be improved representing the population or population mean should be increased accordingly.

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3 years ago