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brilliants [131]
3 years ago
15

Find the percent error of the measurement 4 cm. 4% 1% 12.5% 40%

Mathematics
2 answers:
Anastasy [175]3 years ago
6 0
The answer is C hope it helps
ahrayia [7]3 years ago
5 0

Answer:

C 12.5%

Step-by-step explanation:

I did this one

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Multiply the trinomials.
lora16 [44]

Answer:

b

Step-by-step explanation:

8 0
3 years ago
Factor the expression.<br> 20b + 35 =<br> (Factor completely.)
Airida [17]

Answer:

I think it would be 5(4b+7)

Step-by-step explanation:

I divided both terms by 5.

6 0
2 years ago
Data is collected to compare two different types of batteries. We measure the time to failure of 12 batteries of each type. Batt
-Dominant- [34]

Using the t-distribution, it is found that since the <u>test statistic is greater than the critical value for the right-tailed test</u>, it is found that there is enough evidence to conclude that Battery B outlasts Battery A by more than 2 hours.

At the null hypothesis, it is <u>tested if it does not outlast by more than 2 hours</u>, that is, the subtraction is not more than 2:

H_0: \mu_B - mu_A \leq 2

At the alternative hypothesis, it is <u>tested if it outlasts by more than 2 hours</u>, that is:

H_1: \mu_B - \mu_A > 2

  • The sample means are: \mu_A = 8.65, \mu_B = 11.23
  • The standard deviations for the samples are s_A = s_B = 0.67

Hence, the standard errors are:

s_{Ea} = S_{Eb} = \frac{0.67}{\sqrt{12}} = 0.1934

The distribution of the difference has <u>mean and standard deviation</u> given by:

\overline{x} = \mu_B - \mu_A = 11.23 - 8.65 = 2.58

s = \sqrt{s_{Ea}^2 + s_{Eb}^2} = \sqrt{0.1934^2 + 0.1934^2} = 0.2735

The test statistic is given by:

t = \frac{\overline{x} - \mu}{s}

In which \mu = 2 is the value tested at the hypothesis.

Hence:

t = \frac{\overline{x} - \mu}{s}

t = \frac{2.58 - 2}{0.2735}

t = 2.12

The critical value for a <u>right-tailed test</u>, as we are testing if the subtraction is greater than a value, with a <u>0.05 significance level</u> and 12 + 12 - 2 = <u>22 df</u> is given by t^{\ast} = 1.71

Since the <u>test statistic is greater than the critical value for the right-tailed test</u>, it is found that there is enough evidence to conclude that Battery B outlasts Battery A by more than 2 hours.

A similar problem is given at brainly.com/question/13873630

7 0
2 years ago
If you have 2 pounds of grapes and there $6 how much is 1 pound grapes?
Vikki [24]

Answer:

$3

Step-by-step explanation:

7 0
2 years ago
Read 2 more answers
Find the perimeter and area of a rectangle with a length of 3.4cm and a width of 4.3cm
zimovet [89]

Answer:

perimeter of a rectangle

=2×(L+B)

=2×(4.3+3.4)

=2×7.7

=15.4

Area of a rectangle

=L×B

=4.3×3.4

=146.2

5 0
3 years ago
Read 2 more answers
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