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3 years ago

Please help, Ill mark brainiest if it helps.

Mathematics

1 answer:

Solnce55 [7]3 years ago

7 0

Answer:

57=4u4u

Step-by-step explanation:

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May someone please help me?

vova2212 [387]

Answer:

532m^2

Step-by-step explanation:

Please see the attached pictures for full solution.

5 0

3 years ago

You are interested in estimating the the mean age of the citizens living in your community. In order to do this, you plan on con

Assoli18 [71]

Question:

You are interested in estimating the the mean age of the citizens living in your community. In order to do this, you plan on constructing a confidence interval; however, you are not sure how many citizens should be included in the sample. If you want your sample estimate to be within 5 years of the actual mean with a confidence level of 97% , how many citizens should be included in your sample? Assume that the standard deviation of the ages of all the citizens in this community is 18 years.

Answer:

61.03

Step-by-step explanation:

Given:

Standard deviation = 18

Sample estimate = 5

Confidence level = 97%

Required:

Find sample size, n.

First find the Z value. Using zscore table

Z-value at a confidence level of 97% = 2.17

To find the sample size, use the formula below:

$n = (Z * \frac{\sigma}{E})^2$

$n = ( 2.17 * \frac{18}{5})^2$

$n = (2.17 * 3.6)^2$

$n = (7.812)^2$

$n = 61.03$

Sample size = 61.03

4 0

3 years ago

On the trip from KC to Springfield, the church van consumed 15 gallons of gas to go 179 miles. If gas cost $2.58 per gallon, wha

Otrada [13]

Answer:

$77.4

Step-by-step explanation:

GIVEN: On the trip from KC to Springfield, the church van consumed $15$ gallons of gas to go $179$ miles. If gas cost $\$2.58$ per gallon.

TO FIND: Cost of a round trip to Springfield.

SOLUTION:

Distance of springfield from KC $=179\text{ miles}$

As it is a round trip total distance $=2\times179=358\text{ miles}$

As $15$ gallons gas used for $179$ miles distance

gas required for $1$ mile $=\frac{15}{179}$ gallons

gas required for $358$ miles $=\frac{15}{179}\times2=30$ gallons

cost of one gallon of gas $=\$2.58$

cost of $30$ gallons of gas $=30\times2.58=\$77.4$

Hence cost of roundtrip to Springfield is $77.4

6 0

3 years ago

What is the measure of the complement of 20°

Vesnalui [34]

Answer:

So if you have an angle that is 20 degrees, then the complement angle measures 70 degrees.

6 0

2 years ago

I don't really understand pls help asap

maria [59]

Answer:

It is not proportional

Step-by-step explanation:

To figure out if something is proportional they have to equal the same thing.

As you can see on the problem 0.2 and 0.2 are the same thing, and since one is on the numerator and one is on the demoninator those two can cross out.

Now we come to the 0.08 and the 0.8.

They are not the same thing the 0.08 has an extra 0.

So this is not proportional

<em>-I hope this helps! -Karen</em>

3 0

1 year ago

Read 2 more answers