Write an expression that represents the sum of 7 and x. Please help :) Thanks!

The wildlife department has been feeding a special food to rainbow trout fingerlings in a pond. based on a large number of obser

Liono4ka [1.6K]

The normal distribution curve for the problem is shown below

We need to standardise the value X=405.5 by using the formula

$z-score= \frac{X-Mean}{Standard Deviation}$
$z-score= \frac{405.5-402.7}{8.8} =0.32$

We now need to find the probability of z=0.32 by reading the z-table

Note that z-table would give the reading to the left of z-score, so if your aim is to work out the area to the right of a z-score, then you'd need to do:

$P(Z\ \textgreater \ z)=1 - P(Z\ \textless \ z)$

from the z-table, the reading $P(Z\ \textless \ 0.32)$ gives 0.6255

hence,
$P(Z\ \textgreater \ 0.32)=1-0.6255=0.3475$

The probability that the mean weight for a sample of 40 trout exceeds 405.5 gram is 0.3475 = 34.75%

7 0

3 years ago

Clarence works at least 5 hours but not more than 7 hours. he earns $11.60 per hour. the function f(t)=11.6t represents the amou

Anarel [89]

Thank you for posting you question here at brainly. I hope the answer will help you. The practical domain and the practical range for this situation is below:

D: [5, 7]
R: [58, 81.2]

Feel free to ask more questions here at brainly. I'd be happy to answer.

3 0

3 years ago

At the end of each year, Carl and Linda Munson will deposit $2,100 into a 401k retirement account.

Vanyuwa [196]

Answer:

you get the answer yet im trying to figure it out to

Step-by-step explanation:

6 0

3 years ago

Is 2 to the power of 3 bigger then the square root of 5?

BARSIC [14]

Answer:

Yes.

Step-by-step explanation:

Let's write out each problem:

$\sqrt{5}$ = 2.3

$2^3$ = 8

Now that we have both answers to each expression, we can tell that $2^3$ , in fact, is larger than the square root of 5.

So your answer is, "Yes, $2^3$ is bigger than the square root of 5.

Feel free to give brainlest.

Have an amazing day!

6 0

3 years ago

5. Identify the type and subtype of each of the fol-

r-ruslan [8.4K]

Answer:

a) Kylie has 8 marbles

b) 7 Cylinders

c) 17 carrots

d) 8 marbles belong to Shauntay

Step-by-step explanation:

5. Identify the type and subtype of each of the fol-

lowing problems.

a. Shawn has 15 marbles, which is 7 more marbles than Kyle has. How many marbles does Kyle have?

Shawn = 15 marbles

S = K + 7

15 = K + 7

K = 15 - 7

K = 8 marbles

Kylie has 8 marbles

b. Tiffany has 12 blocks, 5 of which are cubes and the rest cylinders. How many blocks are cylinders?

T = 12 blocks

Cubes = 5

Cylinders = the rest

12 blocks = Cubes + Cylinders

Cylinders = 12 - Cubes

Cylinders = 12 - 5

Cylinder = 7

c. Peter had some carrots. After he ate 3 of them, he had 14 carrots left. How many carrots did Peter have before?

Number of carrots Peter has before

= Number of carrots he ate + Number of carrots he has now

= 14 + 3

= 17 carrots

d. In a bag of 17 marbles, 9 marbles belong to Kelly and the rest belong to Shauntay. How many marbles belong to Shauntay?

Total number of Marbles = 17

Kelly = 9 marbles

Shauntay = ?

Total = Kelly + Shauntay

Shauntay = Total - Kelly's marbles

= ( 17 - 9) marbles

= 8 marbles

8 marbles belong to Shauntay

6 0

3 years ago

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Write an expression that represents the sum of 7 and x. Please help :)Thanks!