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irina1246 [14]
2 years ago
11

A cylinder has a base diameter of 16cm and a height of 19cm. What is it’s volume in Cubic cm to the nearest tenths place

Mathematics
2 answers:
xz_007 [3.2K]2 years ago
7 0
The volume in cubic cm to the nearest tenths place is 70.
lana66690 [7]2 years ago
5 0

Answer:

70

Step-by-step explanation:

add 19 twice and 16 twice to get your answer.

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Simplify<br> (x-5)^2<br> If right will get brainleist
Yuki888 [10]

Answer:

x² - 10x + 25

Step-by-step explanation:

FOIL (first, inner, outer, last)

(x-5)(x-5)

x² - 5x - 5x + 25

x² - 10x + 25

8 0
2 years ago
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What is the approximate diameter of a sphere with a volume of 900 cm ^3?
hichkok12 [17]

Answer:

C. 12

Step-by-step explanation:


3 0
2 years ago
Is the point (1, 2) a solution to the system?
alekssr [168]

Answer:

B) Yes

Step-by-step explanation:

2=4(1)-2

2=4-2

Yes.

2=10(1)-8

2=10-8

Yes.

6 0
3 years ago
A state legislator wants to determine whether his voters' performance rating (0 - 100) has changed from last year to this year.
ra1l [238]

Answer:

Step 1 of 4

Point estimate for the population mean of the paired differences = -8.2

Step 2 of 4

Sample standard deviation of the paired differences = 16.116244

Step 3 of 4

Margin of Error = ±9.326419

Step 4 of 4

90% Confidence interval = (-17.5, 1.1)

Step-by-step explanation:

The ratings from last year and this year are given in table as

Rating (last year) | x1 | 87 67 68 75 59 60 50 41 75 72

Rating (this year) | x2| 85 52 51 53 50 52 80 44 48 57

Difference | x2 - x1 | -2 -15 -17 -22 -9 -8 30 3 -27 -15

Step 1 of 4

Mean = (Σx)/N = (-82/10) = -8.2 to 1 d.p.

Step 2 of 4

Standard deviation for the sample

= √{[Σ(x - xbar)²]/(N-1)} = 16.116244392951 = 16.116244 to 6 d.p.

Step 3 of 4

Confidence Interval for the population mean is basically an interval of range of values where the true population mean can be found with a certain level of confidence.

Mathematically,

Confidence Interval = (Sample mean) ± (Margin of error)

Sample Mean = -8.2

Margin of Error is the width of the confidence interval about the mean.

It is given mathematically as,

Margin of Error = (Critical value) × (standard Error of the mean)

Critical value will be obtained using the t-distribution. This is because there is no information provided for the population standard deviation.

To find the critical value from the t-tables, we first find the degree of freedom and the significance level.

Degree of freedom = df = n - 1 = 10 - 1 = 9.

Significance level for 90% confidence interval

= (100% - 90%)/2 = 5% = 0.05

t (0.05, 9) = 1.83 (from the t-tables)

Standard error of the mean = σₓ = (σ/√n)

σ = standard deviation of the sample = 16.116244

n = sample size = 10

σₓ = (16.116244/√10) = 5.0964038367

Margin of Error = (Critical value) × (standard Error of the mean) = 1.83 × 5.0964038367 = 9.3264190212 = 9.326419 to 6 d.p.

Step 4 of 4

90% Confidence Interval = (Sample mean) ± (Margin of Error)

CI = -8.2 ± (9.326419)

90% CI = (-17.5264190212, 1.1264190212)

90% Confidence interval = (-17.5, 1.1)

Hope this Helps!!!

4 0
2 years ago
Help guys please It’s A TEST!
inysia [295]

Answer:

254.5m^2

Step-by-step explanation:

Use the formula for the area of a circle given the radius:

A = πr^2

A = 3.14(9)^2

A = 254.47m^2

Round to the nearest tenth:

A = 254.5m^2

4 0
2 years ago
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