how to calculate z score
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Answer:

230

Step-by-step explanation:

a = 510(0.93)^t

a = 510(0.93)^11

a = 229.5528082951

Rounded

a ≈ 230

Answer:

there is 15[tex]e^{ \frac{-t}{100}[/tex] amount of salt in the tank after t minute.

Step-by-step explanation:

Given the data in the question;

tank contains 1000L of brine with 20kg of dissolved salt, Pure water enters the tank at a rate of 15L/min.

How much salt is in the tank after t minutes.

Now,

let x represent the amount of salt after t minutes,

so

x(0) = 15

dx/dt = rate in - rate out

Now, since the water entering is pure, the rate in is 0

rate out will be; x/1000 × 10 kg

∴

dx/dt = -x/100

[tex]\frac{1}{x}[/tex]dx = -[tex]\frac{1}{100}[/tex]dt

∫[tex]\frac{1}{x}[/tex]dx =  -[tex]\frac{1}{100}[/tex]∫1dt + c

lnx =  -[tex]\frac{t}{100}[/tex] + c

Now since x(0) = 15

ln15 = c

lnx =  -[tex]\frac{t}{100}[/tex] + ln15

x = [tex]e^{ \frac{-t}{100} + ln15[/tex]

x = 15[tex]e^{ \frac{-t}{100}[/tex]

Therefore, there is 15[tex]e^{ \frac{-t}{100}[/tex] amount of salt in the tank after t minute.

Answer:

94

Step-by-step explanation:

Answer:

The answer is 94.

Step-by-step explanation:

The answer is positive because a negative divided by a negative equals a positive.  

Answer:

12 PENCILS

Step-by-step explanation:

1.50 / 2 = .75

9.00/0.75 = 12

Answer:

666.7

Step-by-step explanation:

66.7*10=666.7

the reason its not 667 is beacuse of the repeateing rule like 1/3 is .33333

and 2/3 is .66667 the reason there is a 7 at the end is becuse you round up so i doesn't run on forever

Answer:

667 km

Step-by-step explanation:

66.7 km / 1 liter

Y = 66.7x

X = Liters of Petrol

Y = Total KM Traveled

Y = 66.7 (10)

Y = 667km

Answer:

90 pages

Step-by-step explanation:

30% complete

70% to go = 63 pages

t = total number of pages

0.7t = 63

∴ t = ⁶³/₀.₇

⁶³/₀.₇ = 90

Answer:

Step-by-step explanation:

(m+2)3

m*3+2*3

3m+6

distributive property example:

a(b+c)

=a*b+a*c

=ab+ac

[tex]3 \: m + 6[/tex] ✅

[tex]\large\mathfrak{{\pmb{\underline{\red{Step-by-step\:explanation}}{\orange{:}}}}}[/tex]

Using the distributive formula, [tex]\sf\purple{a\: ( \:b + c\: ) = \:a b + a c}[/tex], we have

[tex](m + 2) \: 3 \\ = m \times 3 \: + \: 2 \times 3 \\ = 3 \: m + 6[/tex]

Note:-

[tex]\sf\red{PEMDAS\: rule.}[/tex]

P = Parentheses

E = Exponents

M = Multiplication

D = Division

A = Addition

S = Subtraction

[tex]\large\mathfrak{{\pmb{\underline{\orange{Happy\:learning }}{\orange{!}}}}}[/tex]

Answer:

1526.81 mi cubed

Step-by-step explanation:

hope this helped!

Answer:

=1/3*3*9*9*18

=1458mi3

(π=3)

Hey buddy I am here to help!

No, because according to theoretically probability most of the sweet pea plants have purple flowers causing that one plant to have the probability purple flowers more than of the white flowers!

Here is teh mathematical way-

total plants = 90

purple flowers = 70

white flowers = 20

higher probability of flower = 70/90

Hope it helps!

Plz mark me brainliest

Answer:

y= -2/5x-6

Step-by-step explanation:

y int is at -6

rise/run= -2/5

Answer:

question 8

Step-by-step explanation:

y = 4

2x + 3y = 22

put y = 4 into equation 2

2x + 3 ( 4) = 22

2x + 12 = 22

2x = 22 - 12

2x = 10

x = 5

therefore x = 5 and y = 4

Answer:

B.   3x = 90

Step-by-step explanation:

m<QPS + m<RPS = m<QPR

Let m<RPS = x

Then m<QPS = 2x

2x + x = 90

3x = 90

Answer: B.   3x = 90

Answer:

-64

Step-by-step explanation:

Answer:

-5, -1/2

Step-by-step explanation:

I could only show half of the steps, but you can use the app photo math, you just take a pic of the problem and it gives you the answer and explains the steps.

Answer:

Counterexample

Step-by-step explanation:

Counterexample ensures that you are stating your point or opinion and you firmly oppose their general opinion.

Answer:

0.2625 = 26.25% probability that neither is tall and at most one is medium height.

Step-by-step explanation:

Desired outcomes:

Short - Short

Short - Medium

Medium - Short

Probability of two short:

25% are short, so:

[tex]P(A) = (0.25)^2 = 0.0625[/tex]

Probability of short medium or medium short

25% short, 40% medium. So

[tex]P(B) = 2*0.25*0.4 = 0.2[/tex]

What is the probability that neither is tall and at most one is medium height?

[tex]P = P(A) + P(B) = 0.0625 + 0.2 = 0.2625[/tex]

0.2625 = 26.25% probability that neither is tall and at most one is medium height.

Answer:

D

Step-by-step explanation:

Measure of 1 and Measure of 2 will add up to 180 degrees

Answer:

D

Step-by-step explanation:

Supplementary means they add to 180,

In D they form a straight line which is 180 degrees

Answer:

the results of the sale is profit

Answer:

(a) 5:13

(b) 5:8

Step-by-step explanation:

There are 13 books in all.

8 books are new.

13 - 8 = 5 books are used.

Ratio of used books to all books: 5 used books : 13 books in total.

Ratio of used books to new books: 5 used books : 8 new books.

~

Answer

A=  [tex]\frac{5}{13}[/tex]  Or 5:13

B= [tex]\frac{5}{8}[/tex] or 5:8

Step-by-step explanation:

the question asked for you to show the ratio for the number of used books compared to the total number on the shelf. Since it tells us that 8 of the 13 books are new that would mean that the other 5 books that are on the shelf with the 8 new ones would be used. Then you just put it in a ratio, which if im remembering correctly from when i learned this it just looks like a fraction basically. Same goes for the second question except you are just putting the number of used books to the number of new books in ratio form. Hope this helps and also if you  need help learning ratios i gotchu covered :)

Answer:

3mg per BID vistrail

Step-by-step explanation:

Answer:

Step-by-step explanation:

Ok so T = 69

Answer:

They travelled the same distance and they spent the same amount of time from the 225 marker to 230 marker.

Step-by-step explanation:

Given

See attachment for graph

Required

The relationship between distance and time travelled by Kevin and Carrie

The straight line represents Kevin's journey while the curve represents Carrie's

From the graph, we can see that the straight line and the curve both start at the origin (0,0) and they both end at the same point (17,5)

Point (17, 5) represents the 230 marker (i.e. 225 + 5 - 230)

Since the line and the curve meet at this point, then they travelled the same distance and they spent the same amount of time.

Answer:

54,600 ways

Step-by-step explanation:

i hope you understand this

Answer:

11

Step-by-step explanation:

because they empty 6 bags and there are 5 bags left to that is 11 all together

The total number of bags of leaves b is given by the equation b = 11 bags

What is an Equation?

Equations are mathematical statements with two algebraic expressions flanking the equals (=) sign on either side.

It demonstrates the equality of the relationship between the expressions printed on the left and right sides.

Coefficients, variables, operators, constants, terms, expressions, and the equal to sign are some of the components of an equation. The "=" sign and terms on both sides must always be present when writing an equation.

Given data ,

Let the equation be represented as A

Now , the value of A is

Let the total number of bags be = b

The number of bags emptied by Cora's brother = 6 bags

The number of bags left with Cora = 5 bags

So , the equation will be

The total number of bags b = number of bags emptied by Cora's brother + number of bags left with Cora

Substituting the values in the equation , we get

The total number of bags b = 6 + 5

The total number of bags b = 11 bags

Therefore , the value of A is 11 bags

Hence , the number of bags of leaves is 11 bags

To learn more about equations click :

https://brainly.com/question/19297665

#SPJ2

Answer:

C .2 square root of 70 skaskaskaska

Answer:

7. [tex]BC=22[/tex]

8. [tex]EF=8[/tex]

Step-by-step explanation:

7.

It is given that triangle (ABC) is similar to triangle (DEF). This means that triangle (DEF) is a scaled version of the triangle (ABC). Between these two triangles, there is a ratio. This ratio referred to as the ratio of similitude, is a factor that one multiplies a side of the triangle by, to get the length of the corresponding side in the other triangle. This number can be found by dividing the corresponding sides in the triangle.

As per the given picture, side (AB) corresponds to side (DE). Therefore divide side (AB) by (DE) to find the ratio of similitude,

[tex]\frac{AB}{DE}=\frac{10}{5}=2[/tex]

Multiply side (EF) by the ratio of similitude to find the length of its corresponding side (BC).

[tex]2(EF) = 2(11) = 22[/tex]

[tex]BC=22[/tex]

8.

The triangles (ABC) and (DEF) are similar. One can use the same logic applied to the last problem to solve this problem. For further reference, read the intro written to explain the process used to solve the problem (7).

One can see that sides (AB) and (DE) are corresponding sides, divide (DE) by (AB) to find the ratio of similitude;

[tex]\frac{DE}{AB}=\frac{4}{6}=\frac{2}{3}[/tex]

Now multiply this number by side (BC) to find the length of the corresponding side (EF);

[tex](BC)*\frac{2}{3}=EF\\12*\frac{2}{3}=EF\\8=EF[/tex]

Answer:

25

Step-by-step explanation:

Answer:

lỗi text rồi. ko đọc dc :))