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3 years ago

Estimate the sum to the nearest whole number. Then perform the

Mathematics

1 answer:

Burka [1]3 years ago

6 0

Answer:

=100

Step-by-step explanation:

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Plz help I need bt tonight

JulijaS [17]

The answer is 25%.

First: work out the difference between the two numbers you are comparing.

Decrease = Original Number - New Number

35-28=7

Then: divide the decrease by the original number and multiply the answer by 100. % Decrease = Decrease ÷ Original Number × 100

7÷

28=.25

.25*100=25

<h2>Answer is 25%.</h2>

7 0

3 years ago

Apply the distributive property to factor out the greatest common factor. 35+50=35+50=?

a_sh-v [17]

Answer with explanation:

The given mathematical expression to solve : $35+50$

The prime factorization of each term can be written as follows :-

$35=5\times7$

$50=5\times5\times2$

We can see that the greatest common factor of both the terms = $5$

So we rewrite the given expression as :-

$5\times7+5\times10$

By using distributive property :-

$ab+ac=a(b+c)$ , we have

$=5(7+10)=5(17)=85$

3 0

3 years ago

A civil engineer is analyzing the compressive strength of concrete. Compressive strength is normally distributed with A random s

evablogger [386]

Complete Question

A civil engineer is analyzing the compressive strength of concrete. Compressive strength is normally distributed with $\sigma^2=1000$ . A random sample of 12 sample specimens has a mean compressive strength of $\=x=3207psi$ . Round your answers to 1 decimal place. (a) Calculate the 95% two-sided confidence interval on the true mean compressive strength of concrete.

Answer:

$CI=(3189.1,3224.9)$

Step-by-step explanation:

From the question we are told that:

Sample size $n=12$

Standard deviation $\sigma^2=1000psi^2\\\sigma=\sqrt{1000} \\\sigma=31.6$

Sample mean $\=x=3207$

Confidence level =95%

$\alpha=100-95\\\alpha=0.05$ significance level

From table \alpha 0.05

Gives

$Z_c=1.96$

Generally the equation for confidence interval is mathematically given by

$CI=(\=x-\frac{z_c*\sigma}{\sqrt{n} } ),\=X+\frac{Z_C*\sigma}{\sqrt{12} })$

$CI=(3207-\frac{1.96*31.6}{\sqrt{12} } ),3207+\frac{1.96*31.6}{\sqrt{12} })$

$CI=(3189.1,3224.9)$

6 0

2 years ago

Please Help Me!!!!!!!!!!

JulijaS [17]

1st picture question

6 1/2 miles in a 1/2 hour
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19.5 miles in 1 1/2 hrs
26 miles in 2 hrs
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3rd picture question

36/4= 9 songs per commercial

5 th question
37.5/3
12.50$ per day
12.5x is your answer

3 0

3 years ago

All seats in the theater are divided into 6 groups. There are 35 seats in each group. How many seats are in the theater? Write a

diamong [38]

You divide 6 by 35 and you will find your answer

6 0

3 years ago

Read 2 more answers