Answer:
-2.002 is the least
Step-by-step explanation:
both positives are already crossed out its between both negatives -2.002 is less that -2.22
The information systems department of your firm has developed a new database program to store critical information on point of sale purchases. The purchases are made during a busy time of day when the computer is performing many tasks so the amount of computer time used for each transaction is very critical. The old database program would take an average of 55 milliseconds to retrieve one piece of data. The IS department hopes the new program will reduce this time to retrieve data. The new program was tested during a typical day. The number of data retrievals was 144 and the average time to retrieve a piece of data was 53 milliseconds with a sample standard deviation of 16 milliseconds.
a) State the null and alternative hypothesis.
b) Calculate the test statistic.
c) Using the P-value approach in your decision making, at the 0.05 level of significance, is there evidence that the new computer program has reduced the time to retrieve the data? Report p-value and use it to support your conclusion.
d) Does your conclusion in part c) change if an a of 0.025 is used?
Step-by-step explanation:
x'=53
σ=16
n=144
a) hypothesis
H0:µ=55
Ha:µ<55
This is a left tailed test
b) Test statistics
z=(x'-u)/(sigma/sqrt {n})=(53-55)/(16/sqrt{144})
=-1.5
c)Pvalue at z=|-1.5|
pvalue= p(z>1.5)
=1-0.933193
=0.066807
=0.0668
Decision
since pvalue>alpha(0.05) fail to reject the null hypotheis.
Conclusion
There is not sufficient evidence to support the claim the new computer program has not reduce the time to retrieve the data.
d)since Pvalue>alpha(0.025),so fail to reject the null hypothesis.
No, change in conclusion.
If a 3-pound bunch of bananas cost $1.50, how
many pounds of bananas should you be able to
buy for $5.25?
Answer:
Approximately 3 bunches would equal $4.50. So you should be able to buy at least 4 bunches which would be 10 pounds
Find the area of this triangle
Use Heron's formula.
A = sqrt{(s - a)*s - b)(s - c)}, where a, b, and c represent the sides of the triangle.
We need to find s first.
So, s = (a + b + c)/2.
s = (13 + 6 + 9)/2
s = 28/2
s = 14
We now plug everything into the Heron's area formula.
A = sqrt{(14 - 13)(14 - 9)(14 -6)}
A = sqrt{(1)(5)(8)}
A = sqrt{40}
A = 6.3245553203
Let us now round to one decimal place as instructed. We round to the tenths place, in other words.
A = 6.3 cm^2
Did you follow?
The hypotenuse of a right triangle is 8 meters longer than the shortest leg. The longest leg is 4 meters. Longer than the shortest leg find the length of the longest leg
Answer:
the leg is 6.9
Step-by-step explanation:
use the reverse Pythagorean therm
find the square root of 8(squared) - 4(squared) =6.9
Rosalina just started a new job. She has $500 in her bank account. Every week, she deposits $40 into her bank account. Write an expression to represent how much Rosalina has in her account at any given time using x to represent the number of weeks. please help!!!
Answer:
500 + (40x)
Step-by-step explanation:
she already has 500 in her bank account and there are multiple weeks. 40 dollars per week would be 40x since we don’t know how many weeks. then put it in an equation!
Answer:500 + 40w = m
Step-by-step explanation:
500 is the amount you had already then you add 40 per a week so you times that by w depending on the weeks and m is money overall.
this should be the answer
Hoped this helped
Find the perimeter of the figure. If you need to use in your computation, approximate its value as 3.14.
Rectangle topped by a semicircle
12 m
10 m
a. 35.57 m
b. 65.40 m
C. 59.70 m
d. 49.70 m
Answer:
D
Step-by-step explanation:
I NEED HELP!!! PLEASE NO LINK FILE!
Answer:
85.55
Step-by-step explanation:
Trapezoid formula: a+b divided by 2 multiply by h
Another way is to find the area of the shapes individually.
Triangle formula: bxh divided by 2
Rectangle formula: bxh
PLEASE HELP thank you very much
Martina designed a painting for art class, as shown in the drawing below. Her design contains 4 circles on a square canvas. Each circle has a radius of 6 inches. The circles touch the edges of the canvas and each other, as show below.
The shaded section of Martina's design will be painted black. Which is closest to the area that will be painted black?
Answer:
452.39
Step-by-step explanation:
6^2pie * 4 = 452.39
Side of the square
4(6)24inArea
side²24²576in²Area of 4circles
4π(6)²4π(36)144π452.16in²Area of shaded region
576-452.16123.84 in²Determine the radius of a cylinder with the curved area 24cm squared and height 2.0cm
Answer:
the radius of the cylinder is 1.91 cm
Step-by-step explanation:
Given;
curved area of the cylinder, A = 24 cm²
height of the cylinder, h = 2.0 cm
The curved surface area of a cylinder is given as follows;
Curved surface area = 2πrh
where;
r is the radius of the cylinder
24 = 2πrh
r = 24 / (2πh)
r = 24 / (2π x 2)
r = 24 / (4π)
r = 1.91 cm
Therefore, the radius of the cylinder is 1.91 cm
ALGEBRA
write the word sentence as an inequality
1. 2 is more than a number v.
2. a number h is at most 15.
3. a number p is less than 1/2
4. 12 is fewer than a number n.
Answer:
11,7,5,3
Step-by-step explanation:
thats all thank you
Can anyone help me I am stuck on this question! and tysm for the people who helped me! <3 Have a nice day!
Answer:
115.24
Step-by-step explanation:
15.35*4.25=65.2375
65.2375+50=115.2375
115.2375 ≈ 115.24
start time 2 p.m. elapsed time blank and time 8:30 p.m.
Answer:
Well I guess this is a math problem but the middle time would be: 6 hours and 30 minutes.
Step-by-step explanation:
Adding 6 hours to 2 pm makes 8:00 on the dot at night. Adding 30 minutes to 8:00 would be 8:30. There you have your answer.
Which of the following is the graph of y=3/4x−2
The sum of two consecutive numbers is 5. Find the equation representing
the same.
Answer:
Step-by-step explanation:
Let the smallest number = x
The next number will be x + 1
x + x + 1 = 5
2x + 1 = 5 This is likely the answer to the question although it could be the equation above.
Which graph shows four points that represent equivalent ratios? (The first linked pic is A and B, the second linked pic is C and D) AND NO F,U.CKING BOTS, IM TIRED OF IT
B looks like the correct answer.
Before editing, a movie is 120 min long. The edited movie is 25% shorter. What is the
length of the edited movie?
Answer:
90
Step-by-step explanation:
the movie was 25% shorter
25% of 120 is 30
120-30=90
Use technology to find the P-value for the hypothesis test described below.
The claim is that for a smartphone carrier's data speeds at airports, the mean is u = 19.00 Mbps. The sample size is n=23 and the test statistic is
t= - 1.939.
P-value = (Round to three decimal places as needed.)
Answer:
the p-value should be 0.175 sorry if it's wrong :))
Select the value of x that makes the equation
“-3(x + 10) + 2x = 30” true.
1. 60
2. 0
3. 30
4. -60
5. -20
Answer:
-60
Step-by-step explanation:
-3(x + 10) + 2x = 30 becomes -3x - 30 + 2x = 30 after having performed the multiplication. Combining like terms, we get -x = 60, so that x must be -60 (Answer 4)
Find the measure of the indicated angle. Round to the nearest tenth degree.
Answer:
40.5°
Step-by-step explanation:
cosθ=CA/BA-->
cosθ=7.4/9.7-->
cosθ=0.763-->
θ=40.3°
What is y=4^-x as a percentage to the nearest tenth? Please help!
Answer: To convert a number into percent multiple it by 100 and then add the percent sign. These examples convert the numbers 23 and 158 to percents. To convert a number with a decimal into percent, multiply it by 100 and add the percent sign. These examples convert 0.4580; 0.0257; and 0.00458.
Hope this help
Step-by-step explanation:
My grandfather has a big collection of sliver dollars and 50-cent pieces.
Answer:
thats cool
Step-by-step explanation:
PLEASE HELP FAST!!!!
Answer:
Option C. The graph has an oblique asymptote
Step-by-step explanation:
hope it helps...
have a great day
Answer:
C
Step-by-step explanation:
HELP! WILL GIVE BRAINLIEST!!!
Answer:
D
Step-by-step explanation:
As you can see from the image attached below, the equation that is being graphed is
F(x) = [tex]\frac{x}{(x+4)(x-1)}[/tex]
This equation splits off into various directions because the denominator is turns into a quadratic equation. Once solved it provides two values for which the quadratic equation would equal zero. Since this equation is the denominator 0 would give a null value and is why on the graph there is no y value for 1 or -4. Yet all other values are valid and have an different y output.
is this right. ......... I need help
Answer:
yes those all seem to be correct, A, B, and D are the ones that are correct
Please explain (will also give brainliest if you put all the steps)
Answer:
A = 139.5 cm^2
Step-by-step explanation:
Ok, let's break it down into pieces. First let's find the area of the main rectangle. We know that the area of a rectangle is as follows:
A = L x W
A = 9 x 12
A = 108 cm^2
Now we need to find the area of the two triangles. There are two ways to approach this. If you can visualize that you can flip the first triangle and slide it against the second, it becomes a rectangle. Then you can simply use the same formula as before with modified numbers.
L = 7 (height of the triangle
W = 4.5 (base of the triangle (half of 9))
A (both triangles) = 7 x 4.5
A (both triangles) = 31.5 cm^2
If you can't quite figure out how to visualize that, you can simply treat them as two independent right triangles. The formula for the area of a right triangle is as follows:
A = (1/2)b x h
b = 4.5
h = 7
A (first triangle) = (1/2)4.5 x 7
A (first triangle) = 15.75 cm^2
The area of the second triangle is identical
A (second triangle) = 15.75 cm^2
The area of the two triangles added together is
A (both triangles) = A (first triangle) + A (second triangle)
A (both triangles) = 31.5 cm^2
As you can see we got the same answer both ways. Now we just have to add the area of the two triangles to the area of the rectangle
A = 108 + 31.5
A = 139.5 cm^2
- У
D 14x
. A high-school band has d drummers
and 10 violinists. There are 2 more
violinists than drummers. Which of the
following equations represents the
situation?
A d= 10 + 2
B d= 10-2
Cd=2 - 10
D d= 2 x 10
How old am I if 689 reduced by 5 times my age is 464? Write and Solve an Equation with an answer.
Answer:
45
Step-by-step explanation:
689 - 464 = 225
225 /5 = 45
i will give brainliest plzz
Answer:
Need to see the questions lol
Answer:
Where's the Questions? Dude
Help please ! Thank you
Answer:
yes, no, yes
Step-by-step explanation:
Answer:
yes i think so
Step-by-step explanation:
Approximent means close enough wich means if you think about it then yes but remmber tax
one.yes
two.no
three. yes bc its 14.95 but even with tax its a yes
hope i helped :)
Joseph is buying tomato seed packets and cucumber seed packets at the store. He plans to buy 7 seed packets of EACH type of plant. Cucumber seed packets cost $1.89 each. Joseph spends a total of $23.24 on all the seed packets. Which of the following equations can be used to find how much each tomato seed packet (t) costs?
Answer: Reply to this with the "following equations" so i can have those to work from.