A random sample of nine college students yielded the following data concerning thenumber of hours per day each student spent in using mobile phone:
5, 2, 7, 5.5, 3.5, 4, 5, 4.5, 4
Estimate the average number of hours per day spent in using mobile phone by the
college students.

Answers

Answer 1

Answer:

The estimated average number of hours per day spent using mobile phones by college students is approximately 4.5 hours.

To calculate the mean, we sum up all the individual data points and then divide the total by the number of data points. So, in this case, the sum of the data points is:

5 + 2 + 7 + 5.5 + 3.5 + 4 + 5 + 4.5 + 4 = 40.5.

Next, we divide the sum by the number of data points (which is 9 in this case) to find the mean:

40.5 / 9 ≈ 4.5.

Therefore, the estimated average number of hours per day spent using mobile phones by college students is approximately 4.5 hours.

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Answer 2

Answer: Average = Sum of numbers / Number of numbers

Average = (5 + 2 + 7 + 5.5 + 3.5 + 4 + 5 + 4.5 + 4) / 9

Average = 40.5 /9

Average = 4.5

Average = 4.5 hours.

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True or false: In (r, theta), the value of r can be negative.

Answers

The answer to the mathematics question presented above is 'True'. It is correct to say that in (r theta), the value of r can be negative. A negative radius can be used when it comes to graphing a "polar'' function. Thus, the answer to the question is 'true'.

In the picture below

15 is 30% of what number?7 is what percent of 105?
10% of what number is 14?
What percent of 32 is 4?
And finally.. 1% of what number is 11?
Thanks

Answers

#1---> let the number you are trying to find be x for the following questions

30%*x=15
x=15/30%
x=50

#2
10%*x=14
x=14/10%
x=140

#3
(4/32)*100
is the same as (1/8)*100= 12.5%

#4
1%* x=11
x=11/1%
x=1100

by the way * means multiply

What has at least one right angle but is not a square

Answers

There is a Right Triangle

An appliance is for sale at either (a) P15,999 cash or (b) on terms, P1,499 each month for the next 12 months. Money is 9% compounded monthly. Which is lower, the cash price or the present value of the installment terms? Explain.

Answers

The cash price would be lower. A further explanation is below.

According to the question,

Interest rate per month,

$r = (9 \ percent)/(12)$

$= 0.75$ (%)

hence,

The Present value of the monthly payment will be:

= $PMT* \frac{{(1 + Interest \ rate)^(number \ of \ years) - 1}}{Interest \ rate}$

= $1499* ([(1 + 0.75 \ percent)^(12) - 1] )/(0.75 \ percent)$

= $18748.89$

As we can see that the cash price is 15,999. Thus the above answer is right.

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Answer:

Cash price

Step-by-step explanation:

The computation is shown below:

The Interest rate per month (r) = (9% ÷ 12) = 0.75%

Now Present value of the monthly payment is

= PMT × {[(1 + rate of interest)^number of years - 1] ÷ rate of interest}

= 1,499 × {[(1 + 0.75%)^12 - 1] ÷ 0.75%}

= 18,748.89

And the cash price is 15,999

So, the cash price would be lower

What ratio is equivilant to 4:13 which makes 85?

Answers

Let us assume the common ratio to be = x
then
4x + 13x = 85
17x = 85
x = 85/17
= 5
Then
The ratio will be = 4 * 5:13 * 5
= 20:65
So the ration in which the number 85 can be separated is 20:65. i hope the procedure is clear enough for you to understand. You can always use this method for solving similar problems without taking any help from outside. Only be careful while calculating.

a total of 234 tickets were sold for the school play. they were either adult tickets or student tickets. the number of students tickets sold was two times the number of adult tickets sold. how many adult tickets were sold.