In a random sample of 60 students in first grade, the mean hours of sleep per night was 9.6 with a
standard deviation of 0.51. In a random sample of 40 students in 12th grade, the mean hours of sleep per
night was 7.2 with a standard deviation of 0.62.
Which interval is a 99% confidence interval for the difference between the mean hours of sleep?
O (2.36 h, 2. 44 h)
O (2. 19 h, 2.61 h)
O (2. 10 h, 2. 70 h)
O (2.29 h, 2.51 h)
Answer:
c is your answer
Step-by-step explanation:
A plane that carries mail makes a round trip each day from Chicago to New York. It makes 2 intermediate stops on the way to New York and 3 intermediate stops on the way back to Chicago. Suppose you make a graph of the altitude of the plane for one day, with time on the horizontal axis and altitude on the vertical axis. How many times will the graph touch the horizontal axis?
5
7
8
Stops means height is 0 then
So
Total stops while NY=2Total stops while Chicago=3Total stops on both:-
2+35The graph will reach horizontal axis 5times
The scale on a drawing reads 1/16^ prime prime =1^ prime .A2 inch long line represents
A. 8 feet
B. 16 feet
C. 32 feet
D. 64 feet
So
1 in line represents 16ft i e 2^4 ftHence
2in line represents
2(2^4)2(16)32ftYou bought lunch for you and your friend. Lunch came to $22.45 and the sales tax
rate was 9.5%. What is the sales tax amount? (Show your work)
Step-by-step explanation:
⇢ [tex] \sf 22.45 × \frac{9.5}{100} [/tex]
⇢ [tex] \sf \bold{22.45} × 0.095 [/tex]
⇢ 2.13275
⇢2.1 (1 dp)
[tex] \therefore [/tex] Sales tax = $2.1
Help picture below problem 10
Answer:
your answer is none of the above
Suppose a sample of 313 tankers is drawn. Of these ships, 235 did not have spills. Using the data, estimate the proportion of oil tankers that had spills.
Answer:
78
Step-by-step explanation:
313 - 235 = 78
⭐ Question 4(challenging)
What is...
Square root of 61 plus [tex]\pi[/tex] times six to the power of ten
Answer:
189960102.12251
Step-by-step explanation:
[tex]\sqrt{61}+\pi 6^{10}=\sqrt{61}+60466176\pi[/tex]
help me please with this problem
Answer:
20.4
Step-by-step explanation:
First you do 8947.95/30.25 and you will get 295.8 the you divide that by 14.5 and you will get 20.4 and that will be your answer
what is the 25% of 52
Help I don’t get it at all
Answer:
The answer is B.
Step-by-step explanation:
There is one shaded part out of four parts. This means that the shaded part takes up one-fourth of the overall box, or 1/4. To convert fractions to decimal, you need the denominator to be 100: therefore you multiply 25 to the numerator and denominator: 25/100. This is equal to 0.25 or 25%. The answer is B.
Answer:
B.
Step-by-step explanation:
¼ = 1÷4=0.25
0.25×100=25%
Is this the answer please check my answer!!! Thank you!
Answer:
Yeah, you're right.
Step-by-step explanation:
Can someone please state the answers
Answer:
i think it is the first one
Step-by-step explanation:
How do you do 42.5 times 86?
Answer:
3655 use a calculator
Step-by-step explanation:
Nathan sold 120 shares of Mowery, Inc., at $95 per share and paid a commission of $9. What were his proceeds?
Answer:
I think its $11409
Step-by-step explanation:
maybe not but please trust me
b. Lisa has 120 sweets. She gives 2 of them to
her brother. How many sweets does Lisa have left
Answer:
118
Step-by-step explanation:
Answer:
118
Step-by-step explanation:
120-2=118
118 sweets left!
MAX POINTS
WILL GIVE BRANLIEST PLEASE HELP
h(x)=3/x-h +k
Oh no! He seems to be missing some parts though. He was "robbed" of his
asymptotes.
Luckily, he can remember what they were:
1. This functions vertical asymptote was x=-5.
2. This functions horizontal asymptote was y = 12.
Please recreate this function with those identifying features! Please make sure it
looks like the function in the picture
Let's do
[tex]\\ \rm\dashrightarrow y=\dfrac{3}{x-h}+k[/tex]
Release k for some while
If
we take h=0So
y=3/xSo vertical asymptote is at origin now
It mentioned that it's at x=-5 so we need to change x
put -5 in place of h[tex]\\ \rm\dashrightarrow y=\dfrac{3}{x-(-5)}[/tex]
[tex]\\ \rm\dashrightarrow y=\dfrac{3}{x+5}[/tex]
Vertical asymptote at x=-5Now
for k=0 horizontal asymptote at originBut it's given
y is at 12Same put y=12 in place of k
[tex]\\ \rm\dashrightarrow y=\dfrac{3}{x+5}+12[/tex]
h=-5k=12Graph attached for verification
Answer:
h(x)=3/x+5 +12
Step-by-step explanation:
Describe the transformations from the parent function f(x)=x^2 to the function g(x+2)^2+5
2 units to the right, 5 units up
2 units down, 5 units to the left
2 units down, 5 units to the right
2 units to the left, 5 units up
Answer: 2 units to the right, 5 units up
Step-by-step explanation:
Tom saved x silver coins, y gold coins and z bills. How much has Tom saved?
A) xyz
B) x+y+z
C) 3(xyz)
D) z-(y+x)
Answer:
B) x+y+z
Step-by-step explanation:
CARRY ON LEARNING
CORRECT THIS ANSWER
MARK A BRAIN LESS
NEED HELP BRAIN LY FAST
HELP PLS GIVING 20 POINTS!!!! LOOK AT PICTURE FOR QUESTION!!!
Answer:
75; 76; 77
Step-by-step explanation:
four times the sum of 3 consecutive numbers
first number is X
second is X+1
third is X+2
4 × (x + x+1 + x+2) = 912
4(3x + 3) = 912
12x = 912 - 12
x = 900/12
x = 75
the three numbers are : 75 , 76 , 77
HELP PLS PLS PLS PLS PLS z
Answer:
126
Step-by-step explanation:
I got a protracter
The perimeter of a deck is 48 ft. If the length is 16 ft., what is the width?
Answer:
8
Hope This Helps1 :) Please give Brainliest if this does!
Refer to attachment below;
A cup of brewed tea has 54 milligrams less caffeine than a cup of brewed coffee. If a cup of tea has 66 milligrams of caffeine, how much caffeine is in a cup of coffee?
Answer:
120 milligrams
Step-by-step explanation:
x=coffee
x-54=tea
x-54=66
x=66+54=120
Eva deposited $50 in an account earning 10% interest compounded annually.
To the nearest cent, how much interest will she earn in 2 years?
(7y to the fourth power) to the second power
Answer:
7y^(8)
Step-by-step explanation:
(7y^4)^2
=7y^(4×2)
=7y^(8)
Jackson wants to make a scale drawing of idaho, which has a maximum length of about 480miles and a maximum width of about 300 miles. Jackson will use a width of 40 centimeters in his drawing. How long should the length of idaho be in jackson’s drawing?
Answer:
64
Step-by-step explanation:
scale problem
ratio:
300/480 = 40/x
300x = 19200
x = 19200/300
x = 64
quiziz
21.
Use the information given to answer the question.
Consider the information about the number of customers that select various frame
colors at a frame store one day.
• 15 customers select white frames.
• 30 customers select black frames.
• 45 customers select gold frames.
Part A
If there are a total of 2.200 customers that order from the frame store one month, what
is the best approximation for how many customers that month select a black frame?
A. 367 customers
B. 733 customers
C. 1, 100 customers
D. 1. 167 customers
Answer:
B. 733 customers
Step-by-step explanation:
15+30+45=90
since 30 people select a black frame, 1/3 of the customers picked black frames. If this data is consistent through the month (which we have to assume it is) then that means 1/3 of customers select a black frame on average. 1/3 of 2,200 is about 733, so we can assume, using the data given, that about 733 customers selected black frames! :)
If nitrogen is warmer than -320 degrees Fahrenheit, it will be a gas.
Write an inequality that is true only for temperatures at which nitrogen is a gas.
Answer:
Step-by-step explanation:
If nitrogen is warmer than -320 degrees farenheit it will be gas .write an inequality that is true only for temperatures (t) at which nitrogen is a gas.
✓ t>-320=gas if I'm thinking about it correctly
Which will have a negative number?
A)
(-3)(-9)
B
(-6) (4)
-4-5
D)
-7-9
Answer:
[B] (-6)(4)
[C] -4 -5
[D] - 7 -9
Step-by-step explanation:
Note that: {Only with ()}
Negative + Negative = Positive
Negative + Positive = Negative
Positive + Positive = Positive
Hence,
[A] (-3)(-9) =27 Negative + Negative = Positive
[B] (-6)(4) = -24 Negative + Positive = Negative
[C] -4-5 = -9
[D] -7-9 = -16
Thus, the answer is
[B] (-6)(4)
[C] -4 -5
[D] - 7 -9
[RevyBreeze]
Answer:
All of them except A.
Step-by-step explanation:
A = -3 * -9 = 27.
product of 2 negatives is a positive.
B: (-5*4 = -24
C: -4-5 -9
D. -7-9 = -16
divide 2/3 by 1/5 into mixed nuber
Answer:
3 and 1/3 is your answer: aka 10/3
Step-by-step explanation:
hope this helps
What is the value of the expression below? 7 - 4+5
A. 14
B. 40
C. 50
D. 15
Answer:
50
Step-by-step explanation:
First we Calculate what [tex]7^{2}[/tex] is equvalet to:
7 * 7 to solve and get 49
Our equation then becomes:
49 - 4 + 5
Next, subtract left to right:
49 - 4 = 45
Now we get:
45 + 5 = 50 (our answer)