Answer:
The 95% confidence interval for the mean is approximately;
(9.063, 9.737)
Step-by-step explanation:
The given parameters are;
The mean of the sample, [tex]\overline x[/tex] = 9.4
The sample variance, s² = 0.49
The sample size, n = 19
The confidence level = 95%
Therefore, we get;
[tex]CI=\bar{x}\pm t_{\alpha/2} \dfrac{s}{\sqrt{n}}[/tex]
The degrees of freedom, df = n - 1
∴ df = 19 - 1 = 18
From the t-table, the critical-t = 2.101
Therefore, we have;
[tex]CI=9.4\pm 2.101 \times \dfrac{\sqrt{0.49} }{\sqrt{19}}[/tex]
Therefore, we have;
9.4 - 2.101×√(0.49/19) < μ < 9.4 + 2.101×√(0.49/19)
9.0626 < μ < 9.737
∴ The 95% confidence interval for the mean ≈ (9.063, 9.737)
Can you pleaseee help me
The answer is D. 2 you do the equation in prentice first
Multiply
5x (2)
I don’t get it
Answer:
10x
Step-by-step explanation:
(b) In a lab, a substance was heated by 6 °C each hour for 48 hours. What was the total change
in temperature?
Х
Answer:
288 degrees celcius
Step-by-step explanation:
48 x 6 is 288
Answer:
The total change in temperature was 288* degrees.
Step-by-step explanation:
6 x 48 = 288
15 POINTS!!! what is 70x11?
What is the measurement of this angle?
Help me answe this please lol
Answer:
SAS
is the correct answer of this question
Answer:
SAS
Step-by-step explanation:
SAS is an abbreviation for side angle side, which is what your triangle shows.
Aunt Lee bought a toothpaste at a discount of 25%. If the
sales price of the toothpaste was $3, what was the full price
of the toothpaste?
$ ._.00
Answer:
12
Step-by-step explanation:
3 divided by .25 equals 12. You move the decimal of 25% twice to the left to get .25.
Variables are defined by what?
Answer:
A variable is a quantity that may change within the context of a mathematical problem or experiment. ... The letters x, y, and z are common generic symbols used for variables. Sometimes, we will choose a letter that reminds us of the quantity it represents, such as t for time, v for voltage, or b for bacteria.
Step-by-step explanation:
thats true❤️
Answer:
A variable is a quantity that may change within the context of a mathematical problem or experiment. Typically, we use a single letter to represent a variable. The letters x, y, and z are common generic symbols used for variables.
please mark as brainliest
Which statements are true about the toolbox? Select two options.
The shape can be broken into a rectangular prism and a triangular prism.
The shape can be broken into a rectangular prism and a rectangular pyramid.
The formula for the volume of this figure is V = B h + one-third B h.
The volume of the toolbox is 840 inches cubed
The volume of the toolbox is 900 inches cubed
Answer:
Option A and E.
Step-by-step explanation:
It is mentioned that Chiyo has a toolbox having a rectangular prism shape with a length of 8 inches, width of 15 inches, and height of 6 inches.
In addition to this, A triangular prism with a triangular base with base 8 inches and height 3 inches. The prism has a height of 15 inches.
So here the shape can be broken into a triangular prism and rectangular prism
Therefore the first option is correct
Now as we know that
Volume of the rectangular prism is
= l×b× h
= 8 × 15 × 6
= 720
And, the volume of the triangular prism is bh
And, the area of the triangular prism is 1 ÷ 2 × b × h
= 1 ÷ 2 × 8 × 3
= 12
Now the volume is
= 12 × 15
= 180
So, the volume of the tool box is
= 720 + 180
= 900
Hence, the last option is correct
Which fraction is equivalent to -3/2?
Using the diagram shown below, which statement is true?
the measure of
the measure of
the measure of
the measure of
The statement which says that the measure of ∠ABD = ¹/₂ ∠ABC. So, the correct option is C.
Define angle bisector.An angle bisector is defined as a ray, segment, or line that bisects a given angle into two equal angles. The word bisection or half means dividing one object into two equal or identical parts. In geometry, we usually divide triangles and angles by lines or lines that are considered bisectors.
A geometric bisector is a ray, line, or segment that divides a given angle into two equal parts. For example, the bisector of a 60 degree angle divides it into two 30 degree angles. In other words, split the angle into two smaller congruent angles.
For the given case,
Ray BD bisects ∠ABC into two equal angles ∠ABD and ∠DBC; which can be written as ∠ABD = ¹/₂ ∠ABC.
To know more about angle bisector, visit:
https://brainly.com/question/2478436
#SPJ1
The complete question is as follows:
15. A particular compound decays according to the equation y = ae^-0.0736t, where t is in days. Find the half-life of this compound.
Answer:
12
Step-by-step explanation:
help your girl out, plz!!!
Answer:
B. half the students answer 70% or 75% of the questions correctly
simplify the following: 3^2 times 3^2 7 times 7^4 10^9 divided by 10^7 5^8 divided by 5
Answer:
1. 140 times
Step-by-step explanation:
an airship flies 150 km with the wind and then turn around and flies back taking 5 hour and 30 min round trip. Find the speed of the airship in calm weather is 55 mph.
Answer:
150=(55-c)(5.5-t)
5.5-t=150/(55-c)
-t=(150-302.5+5.5c)/(55-c)
t=(152.5-5.5c)/(55-c)
150=(55+c)t using t found about
150=(55+c)(152.5-5.5c)/(55-c)
8250-150c=8387.5-302.5c+152.5c-5.5c^2
5.5c^2=137.5
c^2=25
c=5
So the current is 5mph.
Step-by-step explanation:
You want to install a 1 yd wide walk around a circular swimming pool. The diameter of the pool is 23 yd. What is the area of the walk? Use 3.14 for π.
Answer:
415.48
Step-by-step explanation:
is the area
Three side lengths of a right triangle are given. Does it matter where you substitute the lengths in the Pythagorean Theorem? Explain.
name a pair of parallel lines
Answer:
Two lines will be parallel when their slopes are equal, and two lines will be perpendicular when their slopes are negative reciprocals of each other. Our slopes for these two equations are the coefficient for the x value. Both slopes are equal so these lines are parallel
Step-by-step explanation:
A. 34
B. 55
C. 65
D. 145
Super urgent please help urgent
Answer:
A) the value is less than 67
Step-by-step explanation:
In circle T with m∠STU=78 and ST=8 , find the length of arc SU. Round to the nearest hundredth.
Answer:
10.89
Step-by-step explanation:
The length of the arc SU in the circle T is 10.88 units.
What is circle?A circle is a shape or a curve in a plane that has a fixed distance, called the radius, from a given point, called the centre.
Given that, in a circle T, m ∠STU = 78° and ST = 8, we need to find the length of arc SU,
The length of an arc = central angle / 360° × perimeter
= 78° / 360° × 3.14 × 16
= 10.88
Hence, the length of the arc SU in the circle T is 10.88 units.
Learn more about circle click;
https://brainly.com/question/29142813
#SPJ2
Please help- will give brainlist
Answer:
square = 162 units squared
triangle = 18.7 units squared
Step-by-step explanation:
Common sense
17=s+7
pls help i need thissssssssssssss
Answer:
17=s+7
-7 -7
-----------
10 0
s=10
Step-by-step explanation:
-Subtract 7 from both sides
-Remove the 0 and the addition sign
-You are now left with the equation s = 10
-Once you check to make sure 10 + 7 = 17 you have your answer
Hope this helps :))
A baker has a 20-kg bag of raisins. One-eighth of the bag is used in each batch of cookies. How much is used for 5 batches?
Answer:
12 1/2 kg
Step-by-step explanat
Which of the following best describes the equation below?
y = -2x2 - 4
A.
both linear and nonlinear
B.
neither linear nor nonlinear
C.
nonlinear
D.
linear
Answer:
I think it's C nonlinear
Step-by-step explanation:
Answer:
d
Step-by-step explanation:
use desmos calculator helps with these question
A helicopter is hovering over a landing pad 100 m from where you are standing. The angle of elevation with the ground is 12 degrees. What is the altitude of the helicopter rounded to the nearest tenth.
Answer:
Step-by-step explanation:
A helicopter is hovering over a landing pad 100 meters from where you are ... If the string is stretched straight, how high is the kite above the ground?
HELP ASAP!!!!!!!
What is the width of a rectangle if the area is 2x^2-x-6 and the length is 2x+3?
9/10 - 1/2 can you help
Answer:
4/10 or 2/5
Step-by-step explanation:
9/10-1/2 = 9/10-5/10 = 4/10 = 2/5
Answer:
2/5
Step-by-step explanation:
9/10-1/2
9/10-1×5/2×5
9/10-5/10
9-5/10
4/10
2/5
Luis plans to purchase some new baseball bats and gloves before spring training begins. Luis wants to buy the same bats and gloves he purchased last spring, but he can’t remember the price of each item. Luis recalls making two purchases last spring, each totaling $135 and both tax exempt. The first purchase was for a glove and three bats. The second purchase was for two gloves and a bat. If the current prices of these items are the same as last spring, how much will Luis pay this spring for three gloves and four bats?
Answer:
Luis will pay for three gloves and four bats = $ 270
Step-by-step explanation:
Let the bats be represented by b and gloves by g, then according to the given conditions
3b+ g= $135----equation 1
b+ 2g= $135------equation 2
Subtracting equation 2 from eq. 1 gives
3b+ g= $135----equation 1
-b -2g= -$135------equation 2
2b -g = 0 --------- equation3
2b-g= 0
or 2b= g------ equation4
This means price of 2 bats is equal to price of 1 glove.
Putting value of g in eq. 1 from eq. 4
3b+ 2b= $ 135
5b= $135
b= 135/5= 27
Price of 1 bat = $ 27 and price of 1 glove= 2*27= $54
Luis will pay for three gloves and four bats
= 54*3 + 4*27
= 162+ 108
= $ 270
How many pieces of wire 3.6cm long can be cut from a coil of 1m long?What is the length of the piece left over?
Answer:
We can get 27 pieces of wire 3.6 cm long and have a piece 7/9 cm left over
Step-by-step explanation:
Find the "unit length" by dividing 1 m by 3.6 cm:
1 m
-----------
3.6 cm
Recall that 1 m = 100 cm. Multiply the following by the conversion factor 100 cm / 1 m:
1 m 100 cm
----------- * ----------------- = 27,7777777...
3.6 cm 1 m
We can get 27 pieces of wire 3.6 cm long and have a piece 7/9 cm left over (verify this by dividing 7 by 9 on a calculator).
Answer:
Solution :-Pieces can be cut = 1/3.6
Pieces can be cut = 0.27 m
100 cm = 1 m
0.27 m = 27 cm
Therefore,
The length remaining of wire is 27 cm (approximately)
