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2 years ago

I need help fast plzzzzz

Mathematics

1 answer:

PolarNik [594]2 years ago

4 0

Answer:

Step-by-step explanation:

Find the vanilla first by dividing 420 by 7 and multiplying the quotient by 2 to get 120.

Then find the banana using the equation 35/100 = x/420, cross multiply to get 147.

Add 120 and 147 to get 267.

Subtract 267 from 420 to get 153.

Divide 153 by 9 to get 17.

Get the number of lemon cakes by multiplying 17 by 4.

The number of lemon cakes is 68!

(and chocolate cakes is 85)

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On a measure of artistic abilities the mean for college students in New Zealand is 150 and a standard deviation is 25 give the Z

Digiron [165]

The method for computing a z-score is $\bold{z = \frac{(x-\mu)}{\sigma}}$ , where x is the crude score, $\bold{\mu}$ is the mean population, and $\bold{\sigma}$ seems to be the standard population difference.

The Z value of x is a number $\bold{\frac{(x - \text{mean(series))}}{\text{SD(series)}}}$ are defined where SD is the standard deviation.
Here, we consider series as scores of students of colleges in New Zealand for their artistic abilities.

$\bold{\bar{x}=150}\\\\ \bold{\sigma=25}$

following are the calculation of the Z scores:

$\to \ (a)\ 100:\ \text{Z score}=\frac{(100-150)}{25}= \frac{(-50)}{25} = -2\\\\\to \ (b)\ 120:\ \text{Z score}=\frac{(120-150)}{25}= \frac{(-30)}{25} = -1.2\\\\\to \ (c)\ 140:\ \text{Z score}=\frac{(140-150)}{25}= \frac{(-10)}{25} = -0.4\\\\\to \ (a)\ 160:\ \text{Z score}=\frac{(160-150)}{25}= \frac{(10)}{25} = 0.4\\\\$

Using formula:

$\to \text{Raw score = Mean(series) +Z score} \times \text{SD(series)}$

Calculating the Raw scores:

$\text{(e) -1: Raw score= 150 +(-1)} \times 25 = 125 \\\\\text{(f) -0.8: Raw score= 150 +(-0.8)} \times 25 = 130\\\\\text{(e) -0.2: Raw score= 150 +(-0.2)} \times 25 = 145\\\\\text{(e) 1.38: Raw score= 150 +(1.38)} \times 25 = 184.5\\\\$

Learn more:

brainly.com/question/12865701

3 0

2 years ago

Do you guys know any place to get cheap skateboards, besides Amazon?

Aleksandr [31]

Answer:

um yeah

amazon is good

i have a skate shop called skatepro they have good decks

and um walmart sum times has ok decks for cheap

ebay too but they will be used

3 0

2 years ago

Solve. 3/9A = 81 a = 9 a=81 3/9 a = 27 a = 243

Harrizon [31]

To solve for A, multiply each side by 9A to get rid of the fraction, so then 3 = 81(9A) --> 3 = 729A --> 3/729 = 1/243

6 0

2 years ago

How do i Simplify, using order of operations: the following problem?

spayn [35]

Hello!

Explanation: This question's it's about the order of operations. It stands parenthesis, exponents, multiply, divide, add, and subtract. It can also go left too right.

First, you had to do is calculate parenthesis first.

$3*2+(4+9/3)$

$9/3=3$

$4+3=7$

$3*2+7$

Next, multiply from left too right.

$3*2=6$

$6+7=13$

Then you add left too right.

$13+6$

$13+6=19$

Final answer: → $\boxed{=19}$

Hope this helps!

Thank you!

Have a great day!

-Charlie

7 0

2 years ago

A scientist kept 100 grams of a radioactive material in a container. After 280 days, he observed that 25 grams of the radioactiv

Wittaler [7]

Answer:

B: About 50 grams of the material was left in the container after 140 days.

Step-by-step explanation:

Radioactive materials decay at a rate called "half-lives." After a certain amount of time, the grams of radioactive material will be reduced to half. After that same amount of time again, the material will be reduced to half of the half.

1/4 is equal to 1/2 times 1/2. So, when 1/4 of the material remains, two half-lives have elapsed.

The question states that after 280 days, 25 grams of the material was left in the container. 25 grams is 1/4 of the original 100 grams that the scientist started with at time = 0 days.

When 25 grams of material remain, two half-lives have elapsed. 280 days equals two half-lives for this material. So 140 days (half of 280 days) equals one half-life for this material.

After 280 days (two half-lives), one fourth of the material (25 grams) will remain.

After 140 days (one half-life), half of the material (50 grams) will remain.

5 0

2 years ago