Answer:
The manufacturer's claim is not supported
Step-by-step explanation:
The time duration the battery of the foldable drone is said to last, μ = 4 hours
The number of drones that were tested, n = 10 drones
The sample mean, [tex]\overline x[/tex] = 4.2 hours
The standard deviation, s = 0.4 hours
The hypothesis test level of significance = 0.5
The null hypothesis, H₀; μ = 4
The alternative hypothesis, Hₐ; μ ≠ 4
The test statistic is given as follows;
[tex]t=\dfrac{\bar{x}-\mu }{\dfrac{s }{\sqrt{n}}}[/tex]
We get;
[tex]The \ test \ statistic, \ t =\dfrac{4.2 - 4}{\dfrac{0.4}{\sqrt{10} } } \approx 1.58113883008[/tex]
Therefore, the test statistic, t ≈ 1.58
The degrees of freedom, d. f. = n - 1
For n = 10, we have;
The degrees of freedom, d. f. = 10 - 1 = 9
From the t-table at 0.5 level of significance, the critical-t = 0.7
Given that the test statistic is larger than the critical-t, we reject the null hypothesis and there is enough statistical evidence to suggest that the manufacturer claim is not supported and that the mean is not 4 hours as claimed.
Percentage problems with mixed number
1. What is 15 12 % of 600?
2. Find 33 1/3 % of $1200
3. Calculate 12 1/2% of 160
4. Tim paid 5 14 % interest on $1600 he
borrowed. How much did he pay in
total?
Answer:
1. 93
2.400
3. 20
4. $1684
Step-by-step explanation:
Start by a etting up an equality.
0.155/100 = x/600
Then cross multiply.
(0.155) × (600) ÷ 100 = 93
The ratio of mass of kangaroo to the mass of a penguin is 7:2. The kangaroo weighs 56 kg. What is the mass of penguin?
Answer: 16
Step-by-step explanation:
I think my answer is correct because, if kangaroo is 56 kg and the ration kangaroo to penguin was 7:2 I think we just have to divide 7 by 56. And 56 divided by 7 equals=8. and Since the pengiuins ration is 2 we just have to multiply 8 and 2. And 8 times 2 equals 16.
#[tex]Anime[/tex][tex]Power[/tex]
What is the % of
increase from 62 to
88? (Round to the
nearest tenth.)
Guadalupe went shopping for a new pair of pants because of a sale. The store was offering a 25% discount. What number should she multiply the prices on the tags by to find the price she would have to pay, before tax, in one step?
Pls help me :)
Answer:
0.25 is the answer you just move the decimal of the percentage to the left 2 spaces
Need answer fast thx
Answer:
thats A daddy-o
Step-by-step explanation:
there are 4 out of 12
1/3
33.3333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333 is 1/3
hello please help i’ll give brainliest
Answer:
it is the second answer choice
Answer: B
Step-by-step explanation:
interaction between two different organisms living in close physical association, typically to the advantage of both. each termed a symbiont, must be of different species. can be defined as any kind of relationship or interaction between two dissimilar I guess.
sorry if im wrong
HELP
find the value of x in a circle 8,x, 20,36
Answer:
8.8 i think
Step-by-step explanation:
Please help!!
What is the sum of the measures of the angles of a 25-gon?
4,140º
25º
360º
2,500º
Answer:
4140°
Step-by-step explanation:
The sum of the interior angles of a polygon is
sum = 180° (n - 2) ← n is the number of sides
Here n = 25 , then
sum = 180° × 23 = 4140°
you deposit $900 in a savings account. The account earns 4% simple interest per year. What is the balance after 8 years? What is the interest earned after 8 years?
help please
Solve the following system of equations graphically, Select the graph that shows the correct solution of the systern.
2a +y=2
2-y=1
Answer:
a
Step-by-step explanation:
-2x + 7 = -32 i need help hurry plsss
Answer Is x= -19.5
-2x = -39
-x= 19.5
x= -19.5
What is the volume of the cylinder when the height is 34
inch?
What is the length of this leg?
Calculate the surface area?
Please help
Answer:
0.0846153846 when divided
Answer:
806 in^2
Step-by-step explanation:
we can start by breaking it up into two 11x13 sides and four 13x10 sides.
A=l*h
The first group of just two sides is 13*11 = 143, and for both sides 286 in^2
Then for the second group, 13*10 = 130, and for four sides, 520 in^2
We can add these values together for the total surface area, and we'll get 806 in^2 !
Sin theta=x, 0degree
PLEASE HELP !!!!!!!!!!!!!!!!!!!!!!!!!!!!!
[tex]\huge{ \mathfrak{ \underline{ Answer }\: \: ✓ }}[/tex]
The given figure is a rectangular prism, with dimensions : -
[tex]3.5 \: in[/tex][tex]6.5 \: in[/tex][tex]4 \: in[/tex]Now,
[tex] \large\boxed{ \mathrm{volume = l \times b \times h}}[/tex]
[tex]6.5 \times 4 \times 3.5[/tex][tex] \mathrm{91 \: in {}^{3} }[/tex]_____________________________
[tex]\mathrm{ \#TeeNForeveR}[/tex]
Joey has $350 in his bank account. He pays $15.50 each month for 6 months. 6 months is done how much does joey have in his bank account?
Answer:
Joey has $257 dollars after 6 months.
Step-by-step explanation:
6*$15.50 = $93
$350 - $93 = $257
Have a nice day! :-)
Answer:
he has 257 in his bank account
Step-by-step explanation:
[tex]15.5 \times 6 = 93[/tex]
[tex]350 - 93 = 257[/tex]
A professor surveys students regarding personality as an example of
Answer:
Convenience sampling.
Step-by-step explanation:
Convenience sampling can be understood as a type of sampling that occurs when there is high availability of the population to be investigated.
This method incurs several criticisms because it is not a sampling method that reflects the reality of a population, but convenience sampling can be advantageous due to the speed with which the data are collected and the research initiated, thus being a method recommended for pilot tests.
Max estimates 718 - 331 by rounding each number to the nearest 100 what is Max estimate of the difference?
Answer:
400
Step-by-step explanation:
718-331
= 387
Rounding off to the nearest hundredth the answer is 400
Ill give you the BRAINLIEST (if it lets me)
Answer:
C and A
Step-by-step explanation:
I did this test.
lets fine the answer
Help me with this please!!!!!!
Answer:
4√6
Step-by-step explanation:
cot60➜4√2/t
➜1/√3=4√2/t
➜t=4√2√3
➜t=4√6
Answer:
[tex]2\sqrt{2}[/tex] = t
Step-by-step explanation:
Sin(30) = t / [tex]4\sqrt{2}[/tex]
Sin(30) * [tex]4\sqrt{2}[/tex] = t
[tex]2\sqrt{2}[/tex] = t
Hope this helps!
Will Mark Brainliest!!!
Solve for L
m=ln+2/k
Answer:
L=KN-2/M
I got it right with this answer. Hope this helps.
solve for y. y = 2x - 3
Answer:
..y d tu ideograma idiosincrasias
1.) What percent of $144 is $18?
A.) 10%
B.) 12.5%
B.) 15%
D.) 17.5%
V
E.) None of these choices are correct.
Answer:
the anwser is 12.5 i did this question on a test last week
PLEASE HELP
Find the value of x in the triangle shown below.
Answer:
82^o
Step-by-step explanation:
74 + 24 = 98
180 - 98 = 82^o
Hope it helps!
A 10 foot long fence post is placed in a hole that is 3 feet deep.
How much of the post is above ground?
Answer:
7 feet
Step-by-step explanation:
10 - 3 = 7
A.CED.1/A.REI.4 Tonya has a rectangular rug as shown. The rug is 4 feet longer than it is wide. (Part A) Create an expression that can be used to determine the length and the width of the rug. Write your answers in terms of x.
help me
Answer:
Width of the rug = x feet
Length of the rug = (x + 4) feet
Step-by-step explanation:
Let
Width of the rug = x feet
The rug is 4 feet longer than it is wide.
Length of the rug = (x + 4) feet
For instance, to find the area of the rug
Area of a rectangular rug = length × width
= (x + 4) * x
= x² + 4x
Area of a rectangular rug = x² + 4x
To find the perimeter of the rug
Perimeter of the rectangular rug = 2(length + width)
= 2{(x + 4) + x}
= 2(x + 4 + x)
= 2(2x + 4)
= 4x + 8
Perimeter of the rectangular rug = 4x + 8
Which group of three squares will form a right triangle when
joined at their vertices?
Answer:
Option ?) 17 cm, 15 cm, 8 cm
The assignment should have four options to choose from, but there is only a picture of two.
Step-by-step explanation:
None of the squares shown form a right triangle. To determine if sides form a right triangle, you use this formula:
a²+b²=c²
We are given two options in the picture.
Option A) 18, 10, and 8.
Option B) 12, 9, and 6.
So, now we need to apply the formula:
Option A)
║8² + 10² = 18²
↓
║64 + 100 = 324
↓
║FALSE
Option B)
║6² + 9² = 12²
↓
║36 + 81 = 144
↓
║FALSE
Both of these options are false. But, I decided to look up this assignment to check my answer. It turns out, there are 4 options, and you only had a picture of two. So, what's the answer?
There is an answer choice that shows 3 squares with the lengths of 17 cm, 15 cm, and 8 cm. This is the correct answer.
For proof, let's apply the formula:
Option ?)
║8² + 15² = 17²
↓
║64 + 225 = 289
↓
║TRUE
[Since the option isn't shown, I'll put a '?' so there is no confusion]
A cylinder has a base radius of 2 meters and a height of 2 meters. What is its volume
in cubic meters, to the nearest tenths place?
the answer is 25.1 meters3