Suppose that grade point averages of undergraduate students at one university have a bell-shaped distribution with a mean of 2.56 and a standard deviation of 0.38. Using the empirical rule, what percentage of the students have grade point averages that are between 1.42 and 3.7?
Answer:
99.7% of the students have grade point averages that are between 1.42 and 3.7
Step-by-step explanation:
The Empirical Rule states that, for a normally distributed 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 of 2.56 and standard deviation of 0.38.
Using the empirical rule, what percentage of the students have grade point averages that are between 1.42 and 3.7?
1.42 = 2.56 - 3*0.38
3.7 = 2.56 + 3*0.38
So both these scores are within 3 standard deviations of the mean, which means that 99.7% of the students have grade point averages that are between 1.42 and 3.7
Write an expression, using an exponent that is equivalent to 6 x 6 x 6 x 6 x 6.
Answer:
6^4 = 1296
Step-by-step explanation:
6 to the power of 4
In 2009, Anna paid $3,060 in federal income tax. In 2010, she paid 70% more than in 2009. How much did Anna pay in 2010?
Answer:
$5,202
Step-by-step explanation:
70% more of $3,060 is 2,142.
$2,142 + $3,060 = $5,202
Next time, the rabbit from the previous problem start at 10 where on the number line can he be after the same three jumps?
Previous problem : A rabbit started at point 0 and made 3 jumps: a jump of 4 units, then a jump of 2 units, and then a jump of 1 unit. We do not know the direction of either jump. Where on the number line can this rabbit be now?
Answer:
8
Step-by-step explanation:
Simplify:
5(y + 1) + 5(y – 1)
Answer:
10y
Step-by-step explanation:
Electric circuit consisting of 20 lights, 25% of the lights did not work. How many lights did not work?
Answer:
5 Lights
Step-by-step explanation:
L = .25 * 20 = 5 Lights.
Answer:
20 X 1/4 (25%)=5
5 lights didn't work
Step-by-step explanation:
i need to know x . if you could also explain that would be nice
Answer:
x = 7.5
Step-by-step explanation:
Since the midsegment and the third segment of the triangle are parallel to each other, therefore,
[tex] \frac{8 + 10}{8} = \frac{6 + x}{6} [/tex]
[tex] \frac{18}{8} = \frac{6 + x}{6} [/tex]
[tex] \frac{9}{4} = \frac{6 + x}{6} [/tex]
Cross multiply
[tex] 9*6 = 4(6 + x) [/tex]
[tex] 54 = 24 + 4x [/tex]
Subtract 24 from each side
54 - 24 = 4x
30 = 4x
Divide both sides by 4
30/4 = x
7.5 = x
x = 7.5
A $65 drone is on sale for $51.35. What is the percent of discount?
Answer:
20% off
Step-by-step explanation:
Answer:
21%
Step-by-step explanation:
To calculate the percentage discount between two prices, follow these steps:
Subtract the post-discount price from the pre-discount price.
Divide this new number by the pre-discount price.
Multiply the resultant number by 100.
$51.35-65=13.65
13.65/65= -0.21
-0.21*100=-21
PLEASE HELP I WILL GIVE YOU BRAINLIEST
Answer:
yoo echo stop deleting my answers bro
Step-by-step explanation:
Please help on this I will mark brainlist!!!
State the name of the property illustrated below.
(23+ 8) + 5 = 23+ (8 + 5)
What property is used
Answer:
Step-by-step explanation:
This is the associative property for addition. In informal language, it says under addition, the order of the addition is not critical.
Please help I’m begging I’ll make you brainliest
Answer:
t < 7 (all values less than 7)
All of the values make the inequality true except the bottom row
since you cannot leave 't' as a negative, divide each side of the inequality by -1 (but remember to reverse the inequality symbol)
Step-by-step explanation:
I NEED HELP
Check all the equations.
8 = j – 4
the quotient of a number and two
k + 46
Twelve is the sum of a number and six.
30y
5x = 45
Answer:
8=j-4 the quotient of a number and two=n/2
12=j
Step-by-step explanation:
Twelve is the sum of a number and six.=n+6=12, n=6
k plus forty six (k+46)
y multiplied by 30 (30y)
5x=45=
x=9
sorry the answers are mixed up
Answer: ADF
Step-by-step explanation: have a great day and good luck!!! <3
What is the value of the expression when m=4, n= -9, p= -2, and q= 12?
Answer:
i dont know
Step-by-step explanation:
B: 1
provostwendall65 if you don't know then don't answer.
Sixty percent of a plane's passengers are women and ten percent of those women are in first class. What is the number of women in first class if the plane is carrying 200 passengers?
Answer:
6
Step-by-step explanation:
60 women. 10 percent would be 6 cause 6 x 10 = 60
answer
12
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50 POINTS TO CORRECT ANSWER otherwise will be reported
The sum of two natural numbers is 17402. One of the two numbers is divisible by 10. If the units digit of that number is erased, the other number is obtained. What is the difference of these two numbers?
a) 10,272
b) 11,700
c) 13, 362
d) 14, 238
e) 15426
9514 1404 393
Answer:
d) 14,238
Step-by-step explanation:
Suppose the smaller number is n. If the larger number gives the smaller when it is divided by 10, then the larger number is 10n. The sum of the two numbers is ...
n + 10n = 11n = 17402 ⇒ n = 17402/11
The difference of the two numbers is ...
10n -n = 9n = (9)(17402/11)
This means the difference of the two numbers is 9/11 of the sum, so is ...
(9/11)(17402) = 14,238 . . . . matches D
Bryan bought a DVD player that was marked down from $225 to $117. What is the percent decrease?
ANSWER:
56%
EXPLANATION:
well if you use a proportion it all should solve it self you feel me... Anyways hoped this helped
I really need help what is 854÷7 I will make you a brainlist
Answer:
854÷7=122
Step-by-step explanation:
DIVISION
122
Answer:
The Answer is 122
Step-by-step explanation:
854/7
854-854 equalling 0 and have a value of 122 of how much was divide by using 7
(7 x 122 equal that of 854)
can someone please show steps for this? i tried using a calculator but there was no fog sign thing.
Answer:
(f о g)(0) = 24
Step-by-step explanation:
f(x) = -5x - 1
g(x) = x² - 5
When you see (f о g)(#), they want you to plug the function g(x) into the function f(x).
First find g(0).
g(0) = (0)² - 5
g(0) = 0 - 5
g(0) = -5
Now plug g(0) = -5 into f(x) by replacing all x's with -5.
(f о g)(0) = -5(-5) - 1
Multiply.
(f о g)(0) = 25 - 1
Subtract.
(f о g)(0) = 24
At a local print shop, 14 copies can be made for $4. At this rate, how much would it
cost to make 63 copies?
Fill out the table of equivalent ratios until you have found the value of x.
Copies Dollars
14
4
63
2
Answer:
18 dollars
Step-by-step explanation:
63 divied by 14 = 4.5 x 4 = 18
Shaun's earnings at $12 per hour were less than $150. Write an inequality
Answer:
I think that the answer is 12x<150
Answer:
12x<150
Step-by-step explanation:
if you need help with math go to cymath hoped i helped :>
Answer:
Can I get a brainliest- and also that so nice!!✨
The measure of an angle is 38.1 degrees. What is the measure of its supplementary angle
Answer:
141.9°
Step-by-step explanation:
Gabrielle's age is three times Mikhail's age. The sum of their ages is 84. What is Mikhail's age?
Answer: 21
Step-by-step explanation:
84 divided by 4 = 21 since grabielle is 21, and then mikhail is gonna be 3 times more so it’s gonna be 63
Answer:
Mikhail=21
Gabrielle=63
Step-by-step explanation:
G=3M
G+M=84
G=84-M
3M=84-M
4M=84
M=21
G=63
A company rents out 15 food booths and 23 game booths at the county fair. The fee for a food booth is
$150 plus $4 per day. The fee for a game booth is $95 plus $10 per day. The fair lasts for d days, and all the
booths are rented for the entire time. Enter a simplified expression for the amount, in dollars, that the
company is paid.
The expression is
Answer:
290d + 245
Step-by-step explanation:
Hello! So what you do first is make two equations, then combine them.
For the food booths, the equation would be 15(4d) + 150
For the game booths, the equation would be 23(10d) + 95
Now simplify them.
Food booths: 60d + 150
Game booths: 230d + 95
Next, we combine the two equations to get one equation.
60d + 150 + 230d +95
Simplify even more...
290d + 245
This is going to be your equation. I don't know the number of days the fair went so I can't go any futher on this question. Hope this helps though!
If I have 41 red mechanical pencils and each pencil has 3 pieces of lead in it. How many pieces of lead are there in all
Answer: There are 123 pieces in total.
Step-by-step explanation: If you have forty-one pencils, and each has three pieces of lead, you multiple forty-one by three.
Total lead = 41 * 3
Total lead = 123 pieces
oh nawgs whats thay do to the bod :(
Answer:
lol
Step-by-step explanation:
.....................
amy borrowed money from the lending company at 6% interest if she paid an interest of php450.00 after 19months how much money did she borrow
Answer:
She borrowed php4737.00.
Step-by-step explanation:
This is a simple interest problem.
The simple interest formula is given by:
[tex]E = P*I*t[/tex]
In which E is the amount of interest earned, P is the principal(the initial amount of money), I is the interest rate(yearly, as a decimal) and t is the time.
After t years, the total amount of money is:
[tex]T = E + P[/tex]
6% interest:
This means that [tex]I = 0.06[/tex]
19 months:
An year has 12 months, so [tex]t = \frac{19}{12} = 1.5833[/tex]
She paid an interest of php 450. How much money did she borrow
This is P when [tex]E = 450[/tex]. So
[tex]E = P*I*t[/tex]
[tex]450 = P*0.06*1.5833[/tex]
[tex]P = \frac{450}{0.06*1.5833}[/tex]
[tex]P = 4737[/tex]
She borrowed php4737.00.
jack donates $X per month to charity. Ta the end if 10 months, he had 1250 donated in total. How much did he donate each month
Answer:
He donated $125 per month.
Step-by-step explanation:
$1250 divided by 10 months to figure out how much he payed each month.
a girl took nine test in different subjects and had average of 60%. if in her tenth test she obtained 85%, find her new average
Answer:
62.5%
Step-by-step explanation:
average = sum of scores / number of scores
60% = [sum of 9 tests] / 9
[new average] = [sum of 10 tests] / 10
= ([sum of 9 tests] + 85%) / 10
= ((9 * 60%) + 85%) / 10
= 62.5%
