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Alexandra [31]
3 years ago
13

Helppp I need help ASAP

Mathematics
2 answers:
PSYCHO15rus [73]3 years ago
7 0
The answer would be b...
max2010maxim [7]3 years ago
3 0

Answer:

it would be B

Step-by-step explanation:

the ratio of tomatoes to cheese slices is 18:4 1/2 so that would be 25% of tomatoes.

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Last month he sold 50 chickens and 30 duck fir $550. This month he sold 44 chickens and 36 ducks for $532
natali 33 [55]
Chicken - $8
Duck - $5

Work:
50c+30d=550
44c+36d=532
8 0
3 years ago
There are 5 times as many animals at the Central zoo as there are at the Baty zoo. The Central zoo has 265 animals in all. Let b
zheka24 [161]

Answer:

It's D

Step-by-step explanation:

6 0
3 years ago
The volume of this pyramid is 80cm^3. what is the height?
katovenus [111]
A)13cm that the is the answer
7 0
3 years ago
If t follows a t7 distribution, find t0 such that (a) p(|t | < t0) = .9 and (b) p(t > t0) = .05.
Thepotemich [5.8K]

Answer:

a) P(-t_o < t_7

Using the symmetrical property we can write this like this:

1-2P(t_7

We can solve for the probability like this:

2P(t_7

P(t_7

And we can find the value using the following excel code: "=T.INV(0.05,7)"

So on this case the answer would be t_o =\pm 1.895

b) For this case we can use the complement rule and we got:

1-P(t_7

We can solve for the probability and we got:

P(t_7

And we can use the following excel code to find the value"=T.INV(0.95;7)"

And the answer would be t_o = 1.895

Step-by-step explanation:

Previous concepts

The t distribution (Student’s t-distribution) is a "probability distribution that is used to estimate population parameters when the sample size is small (n<30) or when the population variance is unknown".

The shape of the t distribution is determined by its degrees of freedom and when the degrees of freedom increase the t distirbution becomes a normal distribution approximately.  

The degrees of freedom represent "the number of independent observations in a set of data. For example if we estimate a mean score from a single sample, the number of independent observations would be equal to the sample size minus one."

Solution to the problem

For this case we know that t \sim t(df=7)

And we want to find:

Part a

P(|t|

We can rewrite the expression using properties for the absolute value like this:

P(-t_o < t_7

Using the symmetrical property we can write this like this:

1-2P(t_7

We can solve for the probability like this:

2P(t_7

P(t_7

And we can find the value using the following excel code: "=T.INV(0.05,7)"

So on this case the answer would be t_o =\pm 1.895

Part b

P(t>t_o) =0.05

For this case we can use the complement rule and we got:

1-P(t_7

We can solve for the probability and we got:

P(t_7

And we can use the following excel code to find the value"=T.INV(0.95;7)"

And the answer would be t_o = 1.895

5 0
3 years ago
Perfect square numbers
Softa [21]

Answer:

All the sides are equal. any number as long as all the sides have the same number.

Step-by-step explanation:

4 0
3 years ago
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