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3 years ago

I need help with 10 and 11 and please show work

Mathematics

1 answer:

Rasek [7]3 years ago

7 0

10) The area would be 46.24 ft²
11) $33.55 so rounded is $33.6 all you have to do is divide the 2 numbers and then round.

Hope this Helps!!

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Last month you went on three hikes. One hike was 2 3/4 miles long, one was 1 1/2 miles long, and the other was 3 3/8 miles long

solniwko [45]

2 6/8 + 1 4/8 + 3 3/8
2 + 1 + 3 = 6
6/8 + 4/8 + 3/8 = 13/8
So 6 13/8 or 7 5/8

8 0

4 years ago

HELP ASAP How many times will the digit '3' appear if we write all whole numbers from 1 to 99?

Liula [17]

Answer:3,13,23,30,31,32,33,34,35,36,37,38,39,43,53,63,73,83,93

Step-by-step explanation:

You gotta count I did this quick

8 0

3 years ago

Read 2 more answers

483.6 is what percent of 180

liraira [26]

Answer:

We assume, that the number 180 is 100% - because it's the output value of the task.

2. We assume, that x is the value we are looking for.

3. If 100% equals 180, so we can write it down as 100%=180.

4. We know, that x% equals 483.6 of the output value, so we can write it down as x%=483.6.

5. Now we have two simple equations:

1) 100%=180

2) x%=483.6

where left sides of both of them have the same units, and both right sides have the same units, so we can do something like that:

100%/x%=180/483.6

6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 483.6 is what percent of 180

100%/x%=180/483.6

(100/x)*x=(180/483.6)*x - we multiply both sides of the equation by x

100=0.37220843672457*x - we divide both sides of the equation by (0.37220843672457) to get x

100/0.37220843672457=x

268.66666666667=x

x=268.66666666667

now we have:

483.6 is 268.66666666667% of 180

4 0

3 years ago

A. 6.2 cm2

Flauer [41]

Answer:

The answer is "Option A".

Step-by-step explanation:

$\to Base= 2 \ cm\\\\\to height=3.1 \ cm\\\\$

Formula:

$\bold{Area= base \times height}\\\\$

$=2 \times 3.1 \\\\= 6.2 \ cm^2$

if the height value is 3 then area is =6

4 0

3 years ago

For a 4-unit class like Statistics, students should spend average of 12 hours studying for the class. A survey was done on 24 st

Zanzabum

Answer:

a) 68% of the students spend between 10.2 hours and 15.8 hours on Statistics each week.

b) 95% of the students spend between 7.4 hours and 18.6 hours on Statistics each week.

c) 99.7% of the students spend between 4.6 hours and 21.4 hours on Statistics each week.

Step-by-step explanation:

The Empirical Rule states that, for a normally distributed(bell-shaped) random variable:

68% of the measures are within 1 standard deviation of the mean.

95% of the measures are within 2 standard deviation of the mean.

99.7% of the measures are within 3 standard deviations of the mean.

In this problem, we have that:

Mean = 13 hours

Standard deviation = 2.8 hours.

a) 68% of the students spend between hours and hours on Statistics each week.

Within 1 standard deviation of the mean.

13 - 2.8 = 10.2 hours

13 + 2.8 = 15.8 hours

68% of the students spend between 10.2 hours and 15.8 hours on Statistics each week.

b) 95% of the students spend between hours and hours on Statistics each week.

Within 2 standard deviations of the mean

13 - 2*2.8 = 7.4 hours

13 + 2*2.8 = 18.6 hours

95% of the students spend between 7.4 hours and 18.6 hours on Statistics each week.

c) 99.7% of the students spend between hours and hours on Statistics each week.

Within 3 standard deviations of the mean

13 - 3*2.8 = 4.6 hours

13 + 3*2.8 = 21.4 hours

99.7% of the students spend between 4.6 hours and 21.4 hours on Statistics each week.

8 0

3 years ago