Need help on 2, b, c, and 3 please.

Mathematics

1 answer:

Svetlanka [38]3 years ago

4 0

A/Wall if you have 20 and 30 that box is missing # so you will need to times and you will get something like this 20×30=60 and that's the missing #

B/Its going to be about 768 so you need to times and if you don't get 768

You might be interested in

For the number line shown which statement is not true

Naya [18.7K]

upload the picture...

6 0

3 years ago

Given Triangle IFN congruent to Triangle SJP, name all the pairs of corresponding parts.

Gemiola [76]

Sides
IF=SJ
FN=JP
NI=PS

Angles
I=S
F=J
N=P

5 0

3 years ago

The gypsy moth is a serious threat to oak and aspen trees. A state agriculture department places traps throughout the state to d

k0ka [10]

Part A:

From the central limit theorem, since the number of samples is large enough (up to 30), the mean of the the mean of the average number of moths in 30 traps is 0.6.

Part B:

The standard deviation is given by the population deviation divided by the square root of the sample size.

$standard \ deviation= \frac{\sigma}{\sqrt{n}} = \frac{0.4}{\sqrt{30}} = \frac{0.4}{5.477} =0.073$

Part C:

The probability that an approximately normally distributed data with a mean, μ, and the standard deviation, σ, with a sample size of n is greater than a number, x, given by

$P(X\ \textgreater \ x)=1-P(X\ \textless \ x) \\ \\ =1-P\left(z\ \textless \ \frac{x-\mu}{\sigma/\sqrt{n}} \right)$

Thus, given that the mean is 0.6 and the standard deviation is 0.4, the probability that <span>the average number of moths in 30 traps is greater than 0.7</span> given by:

$P(X\ \textgreater \ 0.7)=1-P(X\ \textless \ 0.7) \\ \\ =1-P\left(z\ \textless \ \frac{0.7-0.6}{0.073} \right)=1-P(z\ \textless \ 1.369) \\ \\ =1-0.91455=\bold{0.0855}$

7 0

4 years ago

Empirical rule of 139 cm and 193 cm

sesenic [268]

<span> 166cm would be your answer.</span>

8 0

3 years ago

9 and 3/4 As a improper fraction

Mrrafil [7]

Answer:

The improper fraction is 39/4.

Step-by-step explanation:

9 3/4 = 36 + 3 / 4

= 39/4

Thus the improper fraction is 39/4.

Hope I helped!

6 0

4 years ago

Read 2 more answers