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
melamori03 [73]
3 years ago
14

Seb made a jump of two and a half meters Kirsty's jump was 10 centimeters longer how long was Kirsty's jump

Mathematics
2 answers:
hoa [83]3 years ago
7 0
First of all, a meter is equal to 100cm.
1m=100cm

Seb made a jump of two and a half meters. (2 \frac{1}{2} or 2.5)
Multiply 100 by 2.

100*2=200

Now we need the half.
What is half of 100? 
50 is half of 100.

So, add 50 to the 200.

200+50=250

Kirsty's jump was 10 centimeters longer.

Add 10 centimeters to the 250 centimeters.
250+10=260

Kirsty's jump was 260 centimeters high, or 2.55 meters.

Misha Larkins [42]3 years ago
6 0
2m 60cm is think because half off 100 is 50 so add 10 on and you get 60
You might be interested in
Students are selling raffle tickets for a school fundraiser. They collect $25 for every 10 raffle tickets sold. Rain equation th
Free_Kalibri [48]

Answer: m= $25/10 r

Step-by-step explanation:

Let m= money

r= raffle ticket

Then according to the statement

m= $25 for 10 tickets

so 10 tickets= $25

Or the equation goes,

m= $25/10 r

7 0
2 years ago
A quality control expert at LIFE batteries wants to test their new batteries. The design engineer claims they have a variance of
iris [78.8K]

Answer:

The probability that the mean battery life would be greater than 533.2 minutes (in a sample of 75 batteries) is \\ P(z>0.48) = P(x>533.2) = 0.3156

Step-by-step explanation:

The main thing we have to take into account in this question is that we are about to find the probability of a <em>sample mean</em>. The distribution for <em>sample means</em> follows a <em>normal distribution</em> with mean \\ \mu and standard deviation \\ \frac{\sigma}{\sqrt{n}}. Mathematically

\\ \overline{x} \sim N(\mu, \frac{\sigma}{\sqrt{n}})

For values of the sample \\ n \ge 30, no matter the distribution the data come from.

And the variable <em>z</em> follows a <em>standard normal distribution</em>, and, as we can remember, this distribution has a mean = 0 and a standard deviation = 1. Mathematically

\\ z = \frac{\overline{x} - \mu}{\frac{\sigma}{\sqrt{n}}} [1]

That is

\\ z \sim N(0, 1)

We have a variance of 3364. That is, a <em>standard deviation</em> of

\\ \sigma^2 = 3364; \sigma = \sqrt{3364} = 58

The population mean is

\\ \mu = 530

The sample size is \\ n = 75

The sample mean is \\ \overline{x} = 533.2

With all this information, we can solve the question

The probability that the mean battery life would be greater than 533.2 minutes

Using equation [1]

\\ z = \frac{\overline{x} - \mu}{\frac{\sigma}{\sqrt{n}}}

\\ z = \frac{533.2 - 530}{\frac{58}{\sqrt{75}}}

\\ z = \frac{3.2}{\frac{58}{8.66025}}

\\ z = \frac{3.2}{6.69726}

\\ z = 0.47780

With this value of z we can consult a <em>cumulative standard normal table</em> (or use some statistic program) to find the cumulative probability for <em>z</em> (and remember that this variable follows a standard normal distribution).

Most standard normal tables have values for z for only two decimals, so we can round the previous value for z as z = 0.48.

Then

\\ P(z

However, in the question we are asked for \\ P(z>0.48) = P(x>533.2). As well as all normal distributions, the standard normal distribution is symmetrical around the mean, and we have

\\ P(z>0.48) = 1 - P(z

Thus

\\ P(z>0.48) = 1 - 0.68439

\\ P(z>0.48) = 0.31561

Rounding to four decimal places, we have

\\ P(z>0.48) = 0.3156

So, the probability that the mean battery life would be greater than 533.2 minutes is (in a sample of 75 batteries) \\ P(z>0.48) = P(x>533.2) = 0.3156.

5 0
3 years ago
Pls help me!!!!!!!!!
Lady_Fox [76]
43. I think it is 403
8 0
2 years ago
Read 2 more answers
The perimeter of an equilateral triangle is 3 (+ 5). The perimeter of a rectangle is 2 (2x - 3) + 2(2). If the perimeters of the
TiliK225 [7]

Answer:

3.25

Step-by-step explanation:

Perimeter of triangle = 3(5) = 15 cm

Perimeter of rectangle = 2(2x - 3 + 4)

Perimeter = 2(2x + 1)

Perimeter = 4x + 2

4x + 2 = 15

4x = 15 - 2

4x = 13

x = 13/4

x = 3.25

5 0
3 years ago
If a dozen eggs cost 4.32 then how much would 17 eggs cost?
Sladkaya [172]
A dozen eggs is $4.32 that is 0.36 cents a egg so 17 eggs would be .36x5=$1.80 then $1.80 + $4.32 = $6.12
5 0
3 years ago
Other questions:
  • What is the square root of x over the square root of x to the 1/4 power
    9·1 answer
  • If the radius of a circle is 3 meters, how long is the arc subtended by an angle measuring 30°?
    15·1 answer
  • A six foot man casts a 14 foot shadow. how long is the shadow of a 40 foot tree?
    11·1 answer
  • Please help ! &lt;3 I would really appreciate it
    5·1 answer
  • PLEASEEE HELP MEEE!! I DONT UNDERSTAND AT ALL!!
    15·1 answer
  • If the interior angle sum of a regular polygon is 5, 940 degrees, how many sides does it have?
    11·1 answer
  • Marie has a recipe that calla for 2 1/4 cups of flour for 3 dozen cookies. How much would show needs to make 60 cookies
    10·2 answers
  • Please help me asap
    5·1 answer
  • Consider the function f(x)= x² - 4
    11·1 answer
  • Helppp quick quick 15 points
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!