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Alex_Xolod [135]
3 years ago
9

Which of these numbers, When rounded to the nearest hundredth, is 0.56? Say all that round to 0.56.

Mathematics
1 answer:
aleksandrvk [35]3 years ago
3 0
Which of these numbers, When rounded to the nearest hundredth, is 0.56? Say all that round to 0.56.

0.555 round it and you will get 0.56
0.556 round it and you will get 0.56

that's all
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To obtain information on the corrosion-resistance properties of a certain type of steel conduit, 45 specimens are buried in soil
Debora [2.8K]

Answer:

statistic value t= 5.43

p-value: < 0.00001.

Step-by-step explanation:

Hello!

To obtain information over the corrosion-resistance properties of a certain type of steel conduit a random sample of 45 specimens was taken and buried for two years.

The study variable is:

X: Max. penetration of a steel conduit.

The data of the sample

n= 45

sample mean X[bar]= 53.4

sample standard deviation S= 4.2

The conduits are manufactured to have a true average penetration of at most 50 mills, symbolically: μ ≤ 50

The hypothesis is:

H₀: μ ≤ 50

H₁: μ > 50

α: 0.05

To choose the corresponding statistic to use to study the population mean, the variable must have a normal distribution. There is no available information to check this, so I'll just assume that the variable has a normal distribution and, since the population variance is unknown and the sample is small, the statistic to use is a Student t.

Under the null hypothesis, the critical region and the p-value are one-tailed.

Critical value:

t_{n-1; 1-\alpha } = t_{44; 0.95} = 1.68

Rejection rule:

Reject the null hypothesis when t ≥ 1.68

t= \frac{53.4 - 50}{\frac{4.2}{\sqrt{45} } }

t= 5.43

The calculated value is greater than the critical value, thedecision is to rject the null hypothesis.

p-value:

P(t ≥ 5.43) = 1 - P(t < 5.43) = < 0.00001.

The p-value is less than α so the decision is to reject the null hypothesis.

Since the null hypothesis was rejected, then the population average of the penetration of the conduits specimens is greater than 50 mils. It is not recommendable to use these conduits.

I hope it helps!

4 0
3 years ago
You have accepted a job offer at an annual salary of $36,980. This salary includes a year-end bonus of $2900. You are paid twice
Free_Kalibri [48]

Your gross pay will be $1595.2 for each paycheck

<h3>What are Arithmetic operations?</h3>

Arithmetic operations can also be specified by subtracting, dividing, and multiplying built-in functions. The operator that performs the arithmetic operation is called the arithmetic operator.

- Subtraction operation: Subtracts the right-hand operand from the left-hand operand.

for example 12 -2 = 10

* Multiplication operation: Multiplies values on either side of the operator

For example 12*2 = 24

You have accepted a job offer at an annual salary of $36,980.

This salary includes a year-end bonus of $2900

So your gross pay = 36980 + 2900 = 15952

You are paid twice per month

12 months × 2 checks = 24 paychecks

15952/ 25= 1595.2

Hence, your gross pay will be $1595.2 for each paycheck

Learn more about Arithmetic operations here:

brainly.com/question/25834626

#SPJ1

8 0
1 year ago
I NEED HELP WITH B PLEASE!! WILL GIVE BRAINLY
Sladkaya [172]

Answer:

AB = 30 & BD = 16

Step-by-step explanation:

Multiply all sides by two

7 0
3 years ago
Problem
Nitella [24]

Answer:maybe 29

Step-by-step explanation:

8 0
3 years ago
How do I transform the equations 5x+4y=8 and -2x+5y=30 so that they are in the form that y=MX+b?
mestny [16]
4y=5x+8 5y=-2x+30 the y always goes first. then the equal sign. next is x and finally just the digit which is also known as "b".
6 0
3 years ago
Read 2 more answers
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