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3 years ago

If 2.4 hours is a tenth of 24 hours How much is that in total minutes?

Mathematics

2 answers:

Komok [63]3 years ago

7 0

2.4 * 60 = 144 total minutes

VMariaS [17]3 years ago

5 0

As 1 hour is 60 minutes, then it is 2.4 x 60 = 144 minutes

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Which of the following is equal to the fraction below? (7/14)^11

almond37 [142]

Answer:

you don`t have the answer choices

Step-by-step explanation:

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3 years ago

A student researcher compares the heights of American students and non-American students from the student body of a certain coll

Nonamiya [84]

Answer:

The 90% confidence interval for the difference between means is (4.189, 8.011).

The point estimate is the difference between sample means and has a value of Md=6.1.

Step-by-step explanation:

We have to calculate a 90% confidence interval for the difference between means.

The sample 1 (American students), of size n1=12 has a mean of 69.4 and a standard deviation of 2.79.

The sample 2 (non-American students), of size n2=17 has a mean of 63.3 and a standard deviation of 3.22.

The difference between sample means is Md=6.1.

$M_d=M_1-M_2=69.4-63.3=6.1$

The estimated standard error of the difference between means is computed using the formula:

$s_{M_d}=\sqrt{\dfrac{\sigma_1^2}{n_1}+\dfrac{\sigma_2^2}{n_2}}=\sqrt{\dfrac{2.79^2}{12}+\dfrac{3.22^2}{17}}\\\\\\s_{M_d}=\sqrt{0.649+0.61}=\sqrt{1.259}=1.12$

The critical t-value for a 90% confidence interval is t=1.703.

The margin of error (MOE) can be calculated as:

$MOE=t\cdot s_{M_d}=1.703 \cdot 1.12=1.911$

Then, the lower and upper bounds of the confidence interval are:

$LL=M_d-t \cdot s_{M_d} = 6.1-1.911=4.189\\\\UL=M_d+t \cdot s_{M_d} = 6.1+1.911=8.011$

The 90% confidence interval for the difference between means is (4.189, 8.011).

4 0

3 years ago

A lawn mower costs $125 and there is a rebate of 20%. How much will the lawn mower cost after the rebate?

kondaur [170]

Answer:

$100 if I'm not mistaken

Step-by-step explanation:

125×0.8

(20 percent off)

3 0

3 years ago

Read 2 more answers

Wendy took a trip from Davenport to Omaha a distance of 300mi. she traveled part of the way by bus which arrived at the train st

Alona [7]

Wendy spent four hours on the train.
If the...
Train Speed= 60 mph
Train Time= x
Bus Speed= 40 mph
Bus Time= 5.5-x
Total Time= 5.5 hr
and
Total Distance= 300 miles
Then we can put all of that into the equation...
60x + 40(5.5-x)= 300
Now, following the order of operations we can free the x from the parenthesis by multiplying 40 by 5.5 and (-x) to get...
60x + (-40x) + 220= 300
Next we can simplify by adding the 60x and (-40x) to get...
20x + 220= 300
After that we need to get the x alone on the left side. To do this we must use reverse order; if we subtract 220 from 220 on the left side and then we can subtract 220 from 300 on the left side. Remember the Golden Rule of Algebra! If you add, subtract, multiply, divide, or raise to a power on one side you must do it on the other! This gives us...
20x + 220 - 220= 300 - 220
20x= 80
Now all that is left to get x all alone on the left is to look back at the golden rule of algebra and divide 20 from both 20x and 80. Which gives us...
20x/20 = 80/20
x= 4

And that gives us our answer! 4 hours :D

Hope this helped!

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3 years ago

A theater club sold 400 tickets for a school play. On the frist day, 60% of the 400 tickets were sold. How many tickets were sol

VashaNatasha [74]

60% as a decimal is 0.6. The number of tickets sold the first day is 0.6*400 = 240 tickets.
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Hope this helps!
==jding713==

4 0

3 years ago

Read 2 more answers