1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Artyom0805 [142]
3 years ago
6

PLEASE EXPLAIN WHAT YOU DID!!!!!

Mathematics
1 answer:
marysya [2.9K]3 years ago
8 0
To find the height of the box, you will use the formula for finding volume of a prism and solve for the height.

V = Bh, where B is the area of the base

439.2 = 1/2 x 6.9 x 18 x h
439.2 = 62.1h
h = 7.07

The height of the triangular prism is approximately 7.07 inches.

You might be interested in
Suppose an automotive repair company wants to determine the current percentage of customers who keep up with regular vehicle mai
Nina [5.8K]

Answer: 1692

Step-by-step explanation:

Formula to find the sample size :

n=p(1-p)(\dfrac{z_{\alpha/2}}{E})^2

Given : Confidence level : (1-\alpha)=0.90

⇒ significance level =\alpha= 0.10

z-value for 90% confidence interval (using z-table)=z_{\alpha/2}=1.645

Prior estimate of the population proportion (p) of customers who keep up with regular vehicle maintenance is unknown.

Let we take p= 0.5

Margin of error : E= 2%=0.02

Now, the required sample size will be :

n=0.5(1-0.5)(\dfrac{1.645}{0.02})^2

Simplify , we get

n=(0.25)(6765.0625)=1691.265625\approx1692

Hence, the required sample size = 1692

8 0
3 years ago
Read 2 more answers
How to express the radical using the imaginary unit , i. Please help
Hitman42 [59]

Answer:

± 4i\sqrt{5}

Step-by-step explanation:

\sqrt{-80} = \sqrt{16(5)(-1)}

= \sqrt{16} × \sqrt{5} ×\sqrt{-1}

= 4\sqrt{5}i → [ \sqrt{-1} = i ]


3 0
3 years ago
The mean time it takes to walk to the bus stop is 8 minutes (with a standard deviation of 2 minutes) and the mean time it takes
11111nata11111 [884]
(a) Average time to get to school
Average time (minutes) = Summation of the two means = mean time to walk to bus stop + mean time for the bust to get to school = 8+20 = 28 minutes

(b) Standard deviation of the whole trip to school
Standard deviation for the whole trip = Sqrt (Summation of variances)

Variance = Standard deviation ^2
Therefore,
Standard deviation for the whole trip = Sqrt (2^2+4^2) = Sqrt (20) = 4.47 minutes

(c) Probability that it will take more than 30 minutes to get to school
P(x>30) = 1-P(x=30)
Z(x=30) = (mean-30)/SD = (28-30)/4.47 ≈ -0.45
Now, P(x=30) = P(Z=-0.45) = 0.3264
Therefore,
P(X>30) = 1-P(X=30) = 1-0.3264 = 0.6736 = 67.36%

With actual average time to walk to the bus stop being 10 minutes;

(d) Average time to get to school
Actual average time to get to school = 10+20 = 30 minutes

(e) Standard deviation to get to school
Actual standard deviation = Previous standard deviation = 4.47 minutes. This is due to the fact that there are no changes with individual standard deviations.

(f) Probability that it will take more than 30 minutes to get to school
Z(x=30) = (mean - 30)/Sd = (30-30)/4.47 = 0/4.47 = 0

From Z table, P(x=30) = 0.5
And therefore, P(x>30) = 1- P(X=30) = 1- P(Z=0.0) = 1-0.5 = 0.5 = 50%
8 0
3 years ago
How do i covert a fraction into a decimal.
Olenka [21]

Answer:

By dividing the top number by the bottom.

Step-by-step explanation:

ummmmm

3 0
3 years ago
Is 8.73 a rational number
djverab [1.8K]

Answer:

Yes

Step-by-step explanation:

8  73/ 100=8.73

3 0
3 years ago
Other questions:
  • Three people become infected with a virus that spreads quickly. Each day that passes, the number of infected people doubles. How
    6·1 answer
  • I need to know hoe to solve 3x-5y=9;x=1,0,1<br> i have to solve for y
    6·1 answer
  • Helps me ASAP!!! I dont get it:)
    8·1 answer
  • A small box of oranges costs $9 and weighs 12 pounds. A large box of oranges costs $18 and weighs 30 pounds. Right now one of th
    14·1 answer
  • Geometry what is the answer
    8·1 answer
  • Hi I need help here Is one of the questions Find the GCF of 8 and 12
    8·2 answers
  • How many soulutions does -2(6-3x)=-12+6x have ?
    6·1 answer
  • James determined that these two expressions were equivalent expressions using the values of x = 4 and x = 6. Which statements ar
    10·2 answers
  • Select all equations that are equivalent to x2+6x=16.<br>​
    14·1 answer
  • What is the image of the point (-5,-4) after a rotation of 180° counterclockwise about the origin?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!