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
Anarel [89]
3 years ago
8

The math clubs car can travel 9 meters in a second. The race track for the soap box derby is 63 meters long. How many seconds wi

ll it take the Math clubs car to make it around the track
Mathematics
1 answer:
zhenek [66]3 years ago
5 0

Answer: it will take 7 seconds

Step-by-step explanation: 9 x 7 = 63

You might be interested in
Hey hey hey bye bye bye
Jet001 [13]
Hey times three bye times three
7 0
3 years ago
3.) Find the domain and range for each of the following functions.
Delvig [45]
Domain is x’s and range is y’s.

For a, the domain is -2<=x<1
For a, the range is 1<=y<2

For b, the domain is 1<=x<=2
For b, the range is -2<=y<=2

(The <= is the ones with a line under, meaning equal to, if that makes sense. So write with a line under rather than equal sign)
Hope this helps!
6 0
3 years ago
What is coordinate geometry​
Elina [12.6K]

is the study of algebraic equations on graphs

An example of the coordinate geometry is plotting point,lines and curves on

an x & Y axis thanks

7 0
3 years ago
Factor using the identity: a3 + b3 = (a + b)(a2 – ab + b2) 8z3 + 27
vivado [14]

Answer:  this is our required factor i.e.

8z^3+27=(2z+3)(4z^2-6z+9)

Explanation:

Since we have given that

8z^3+27

As we know the identity , which says that

a^3+b^3=(a+b)(a^2-ab+b^2)

So, we can use this here ,

8z^3+27=(2z)^3+3^3\\\\=(2z+3)((2z)^2-2z\times 3+3^2)\\\\=(2z+3)(4z^2-6z+9)

Hence this is our required factor i.e.

8z^3+27=(2z+3)(4z^2-6z+9)


7 0
3 years ago
Read 2 more answers
An insurance company has 25,000 automobile policy holders. If the yearly claim of a policy holder is a random variable with mean
telo118 [61]

Answer:

P(T>8300000)=1-P(T

Step-by-step explanation:

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".  

The central limit theorem states that "if we have a population with mean μ and standard deviation σ and take sufficiently large random samples from the population with replacement, then the distribution of the sample means will be approximately normally distributed. This will hold true regardless of whether the source population is normal or skewed, provided the sample size is sufficiently large".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

Data given

n = 25000 represent the automobile policy holders

\mu= 320 represent the population mean

\sigma =540 represent the population standard deviation

Let T the variable that represent the total of interest on this case. We can assume that the random variable for an individual policy holder is given by:

X\sim N(\mu = 540, \sigma=540)

From the central limit theorem we know that the distribution for the sample mean \bar X is given by:

\bar X \sim N(\mu, \frac{\sigma}{\sqrt{n}})

Solution to the problem

First we need to find the distribution for the random variable T like this:

\bar X = \frac{\sum_{i=1}^n x_i}{n}

And the total T is given by:

T=\sum_{i=1}^n X_i =n \bar X

We can find the expected value, variance and deviation for this random variable like this:

E(T)= n E(\bar X) = n \mu = 25000*320=8000000

Var(T)= Var(n\bar X)= n^2 Var(\bar X) = n^2 \frac{\sigma^2}{n}=n \sigma^2 =25000*(540^2)=7290000000

Sd(T)=\sqrt{7290000000}=85381.497

And we are interested on this probability:

P(T>8300000)

And we can use the Z score formula given by:

Z=\frac{T-E(T)}{\sigma_T}

P(T>8300000)=1-P(T

6 0
3 years ago
Other questions:
  • HELP PLEASEEEEEEEEEE!
    10·1 answer
  • one angle of a triangle measures 120 degrees. the other two angles are congruent. write and solve an equation to find the measur
    5·1 answer
  • Somebody, please answer this!
    14·1 answer
  • Estimate the quotient 6783÷8
    8·2 answers
  • Graph the linear inequality.<br> y&lt;2
    9·1 answer
  • There are 30 students in a class that took a test. The average grade of 10 students was 80. The other 20 students average was 89
    5·1 answer
  • Help PLEASE ill give brainliest!
    14·2 answers
  • Several students measured a 25mm long nail and wrote the measurements shown in the table below. Whose measurement had the greate
    11·1 answer
  • Dominic is going to invest $1,800 and leave it in an account for 17 years. Assuming the interest is compounded annually, what in
    15·1 answer
  • Triangle RST is made of points R(-10, 5.6), S(0, 7) and T(-6, -34).
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!