Answer:
It should be 100 days sample so that the margin of error will be 39.2 tons or less
Step-by-step explanation:
We are given that A coal company wants to determine a 95% confidence interval estimate for the average daily tonnage of coal that it mines.
[tex]\alpha = 0.05[/tex]
To Find two tailed critical value using Z table
[tex]Z_{\frac{\alpha}{2}}=Z_{\frac{0.05}{2}}=\pm 1.96[/tex]
Margin of error = ME = 39.2
[tex]\sigma = 200[/tex]
Formula : [tex]n = (\frac{Z_{\frac{\alpha}{2}} \times \sigma}{ME})^2[/tex]
[tex]n = (\frac{1.96 \times 200}{39.2})^2[/tex]
n=100
Hence it should be 100 days sample so that the margin of error will be 39.2 tons or less
Which of the following parent functions has a domain and range of all real
numbers?
A. Cubic
B. Reciprocal
C. Quadratic
D. Absolute value
Parent functions has a domain and range of all real numbers is a Cubic function
Given :
We need to find the parent function that has a domain and range of all real
numbers.
Domain is the set of all x values and range is the set of y values.
For any cubic function there is no restriction for x
For each value of x there is a y value
So, domain and range of cubic function is set of all real numbers
For reciprocal function , there will be x in the denominator . So there will be some restriction for x.
For any quadratic function , domain is set of all real numbers. For quadratic we get U shaped graph . It means there is some restriction for y.
So range cannot be real numbers
For absolute value function , we get V shaped graph . so there is some restriction for y. Range cannot be all real numbers.
parent functions has a domain and range of all real numbers is a Cubic function
Learn more : brainly.com/question/19963818
Alice borrowed $1,700 from the bank. 7 years later, Alice owes the bank $2,176. What was the percentage rate of simple interest on the
Answer:
I believe its 78.13%
Answer:
4%
Step-by-step explanation:
I need some more help I don’t know how to do my apex math:(
HELPPP PLEASEEE
g(t) = 6 - 1
g
-) = -7
t is -1
g ( t ) = 6t-1
g (-1) = 6(-1)-1
= -6-1 = -7
write an equation to solve for x your only writing the equation. 7x+9 5×+3 there's three answers the bottom one is if none of the other two are right I thought the answer was number two but the person that answered it gave me a different number so somebody can help me I would mark this brainest did you see the third option is blank I came up with the answer number two is that correct or is it the 7x + 9 + 5x + 3 equals 180 brainest awared
Answer:
7x + 9 + 5x + 3 = 180Step-by-step explanation:
its a supplementary angles:
so the equation is add the two equation equals to 180
7x + 9 + 5x + 3 = 180
Determine if the following function is Even,Odd or neither. f(x) =4x+3
Answer:
It is odd
Step-by-step explanation:
For example let's substitute 1 for x
f(x) = 4(1)+3
4+3
f(x) = 7 this is odd
Let's substitute 2
f(x) = 4(2)+3
8+3
f(x) = 11 this is odd
This means no matter what you substitute for x, it will be odd
Hope this helps!
Find the midpoint of the line segment joining the points.
(-2,-1) and (-10, 10)
Answer:
(-6, 9/2)
Step-by-step explanation:
-2+-10/2 = -6
-1+10/2 = 9/2
Annie bakes cookies and cupcakes in a ratio of 2 to 7 for her gift boxes. Her school needs 36 desserts to sell in a bake sale. How many cupcakes will she bake? How many cookies will she bake ?
Answer:
8 cookies and 28 cupcakes
Step-by-step explanation:
[tex]2+7=9\\36/9=4\\[/tex]
[tex]2[/tex] × [tex]4=8[/tex]
[tex]7[/tex] × [tex]4=28[/tex]
[tex]8+28=36[/tex]
What is 5 plus 5 minus two plus three mines 17
Answer:
-6
Step-by-step explanation:
5+5=10 10-2=8 8+3=11 11-17=-6
a bag of a certain type of sand weighs 42 pounds and has a volume of 0.5 cubic feet. a sandbox has a volume of 16 cubic feet. approximately how many pounds of sand will it take to fill the sandbox
Answer:32
Step-by-step explanation:I divided 16 by 0.5
Emily is saving up to buy a new phone. She already has $75 and can save an additional $7 per week using money from her after school job. How much total money would Emily have after 4 weeks of saving? *
Anwser - 103$$$$$$$$$$$$$$$$
Answer:$28
Step-by-step explanation: 7 x 4
***INCORRECT***
Subtract. 125−(−35) Enter your answer, in simplest form, in the box.
(DONT JUDE ITS LFE)
HELP
Answer:
Hi there!
Your answer is:
160
Step-by-step explanation:
two negatives equal a positive!
Change the -(-) sign into a positive, and add!
125+35=160
What is the area of the triangle?
Answer:
40
Step-by-step explanation:
1/2 x Base x Height which is the formula to find area of triangles
Amy practice yoga 20 minutes each day before school and 30 minutes each day after school she is in school Monday through Friday how many minutes does Amy practice yoga in four weeks please show your work
Answer:
1000
Explanation:
The equation would be 5(20+30)*4=_____
First, we add 20 and 30 to get 50, now we multiply 5 by 50 to get 250, then multiply 250 by 4 to get 1000.
Can I also get a Brainliest?
can y'all pleas help me with this
Answer:
B
Step-by-step explanation:
Siri said thats right
Answer:
-18
Step-by-step explanation:
the square root of 324 is 18, so you add the negative sign, and get your answer
An airplane covers 94 miles in 1/6 of an hour
The airplane can cover blank miles in 6 hours
What is the answer
Answer:
3384 Miles in 6 hours
Step-by-step explanation:
94 x 6 would equal how many miles the airplane covers in 1 hour.
1 hour equals 564 miles.
564 x 6 equals 3384 miles in 6 hours
Which is a better deal?
An ice company charged $6.02 for 7 bags of ice. If a
convenience store sold 6 bags of ice for $5.52, which is a
better buy?
Explain/Justify your answer
Answer:
The $6.03 for 7 bags of ice is a better deal
Step-by-step explanation:
In order to find out which is a better deal we find the unit price.
To find the unit price we do the cost divided by how many bags of ice.
6.02 divided by 7 = 0.86, so the unit price is 0.86/1
5.52 divided by 6 = 0.92, so the unit price is 0.92/1
Finally, we can see which has a lower unit price which is the $6.03 for 7 bags of ice
The sum of two consecutive even integers is
−30.
Find the numbers.
What is the greatest common divisor of 6, 9, and 12? *
13 candy bars weigh 390 what is the weight of 35 candy bars
Answer:
1050 :)
Step-by-step explanation:
7. During a person's commute to school, she spends 10 minutes driving 30 miles per hour (mph) and 5 minutes stopped at red lights. (a) (1 pt.) Find the distance of her commute.
Answer:
Total distance = 5 miles
Step-by-step explanation:
Given:
Total time for drive = 10 min = 10 / 60 = 1/6 hour
Time for stop = 5 min
Speed = 30 miles pr hour
Find:
Total distance
Computation:
Total distance = Speed × time
Total distance = 30 × (1/6)
Total distance = 5 miles
1. Identify the plane parallel to plane ACE
Answer:
It has parallel sides
Step-by-step explanation:
Daniels fish tank holds 24 liters of water he uses a 4 liter bucket to fill the tank how many buckets of water are needed to fill the tank
Answer:
6
Step-by-step explanation:
4 x 6 = 24 L
what is the answer to 198=154+7x-68
Answer:
it is x=16
Step-by-step explanation:
please help me i tive stars
The area of this figure
20 in. is
square inches
28 in.
30 in.
7 in.
25 in.
Enter
Answer
Answer:
20.40,28.59,30.60,25.50 is the units if the area
Step-by-step explanation:
mark me BRAINLIEST
50 apples cost $25. How much would 75 apples cost?
Answer:
37.50
Step-by-step explanation:
hope this helps!!
What is a troll?
Quick I’m being timed
Answer:
a joke? someone who jokes around?
How do you solve -2 1/2+3/4÷3/8
Step-by-step explanation:
1. use PEMDAS (Parentheses, Exponent, Multiplication & Division, Addition & Subtraction). you would do 3/4 divided by 3/8 first.
3/4 / 3/8 = 2
2. add 2 to -2 1/2 (or if it's easier to understand, do 2 minus 2 1/2)
-2 1/2 + 2 = -1/2 OR 2- 2 1/2 = -1/2
answer is -1/2
<1 and <2 are ____ angles
similar
complementary
supplementary
congruent
Answer:
supplementary
Step-by-step explanation:
Answer:
supplementaryStep-by-step explanation:
although there are now angles given, we can assume
that <1 and <2 are supplementary angles