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dmitriy555 [2]
3 years ago
6

Divide. 18÷9 to the simpest form

Mathematics
1 answer:
Oxana [17]3 years ago
6 0

Answer:

18÷9=2

Step-by-step explanation:

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A random sample of 64 freshmen spent an average of 14 hours per week watching television. the sample standard deviation was 32 h
NemiM [27]

Answer:

+/- 1.9983

Step-by-step explanation:

The critical values for a confidence interval for the population mean, with population standard deviation not known, are obtained from the student's t distribution.

The sample size is given as 64. The degrees of freedom will thus be;

sample size - 1 = 64 - 1 = 63

The confidence level is given as 95%. The level of significance will thus be;

100 - 95 = 5%.

The area in the right-tail will thus be 2.5%. Therefore, we looking for a t-value such that the area to its right is 2.5% and the degrees of freedom being 63. From the t-tables we have;

+/- 1.9983

3 0
3 years ago
Find area of the shaded region.
anyanavicka [17]

Answer:

area of shaded portion = 226.09 m²

Step-by-step explanation:

area of circle = πr² = (3.14)(18.6²) = 1086.314 m²

area of 123° segment = (123/360)(1086.314) = 371.157 m²

cos 61.5° = height/18.6 = 8.875

height of triangle = 8.875 m

sin 61.5° = 1/2base/18.6 = 16.346,   base = 32.692 m

base of triangle = 32.692 m

area of triangle = 1/2bh = 1/2(8.875)(32.692) = 145.071 m²

area of shaded portion = 371.157 - 145.071 = 226.09 m²

5 0
3 years ago
Will give Brainlyest answer!
cluponka [151]

Answer:

c

Step-by-step explanation:

3 0
3 years ago
Evaluate the geometric series. Please help me out!!!
vredina [299]

Answer:

- 1364

Step-by-step explanation:

The n th term of a geometric series is

a_{n} = a(r)^{n-1}

where a is the first term and r the common ratio

4(-2)^{n-1} ← is an n th term

with a = 4 and r = - 2

The sum to n terms of a geometric series is

S_{n} = \frac{a(r^{n}-1) }{r-1}, thus

S_{10} = \frac{4((-2)^{10}-1) }{-2-1}

      = \frac{4(1024-1)}{-2-1}

      = \frac{4(1023)}{-3}

      = \frac{4092}{-3}

      = - 1364

6 0
3 years ago
Help please need to turn In tomorrow
iragen [17]
10% of 90 is 9. You can try cross multiplying.
8 0
3 years ago
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