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3 years ago

Please help me with this.

Mathematics

1 answer:

Lelechka [254]3 years ago

8 0

It takes 12 minutes to fill the bathtub!!

hope this helps ;))

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Solve for m: 5m - 9 = 4m + 2 0 11 1 -7 WILL GIVE BRAINLIEST!

Tju [1.3M]

Answer:

Step-by-step explanation:

5m - 9 = 4m + 2

Subtract 4m and add 9 to both sides:

m = 11

8 0

2 years ago

The brand manager for a brand toothpaste must plan a campaign designed to increase brand recognition. He wants to first determin

bulgar [2K]

We need to find out how many adults must the brand manager survey in order to be 90% confident that his estimate is within five percentage points of the true population percentage.

From the given data we know that our confidence level is 90%. From Standard Normal Table we know that the critical level at 90% confidence level is 1.645. In other words, $Z_{Critical}=1.645$ .

We also know that E=5% or E=0.05

Also, since, $\hat{p}$ is not given, we will assume that $\hat{p}$ =0.5. This is because, the formula that we use will have $\hat{p}(1-\hat{p})$ in the expression and that will be maximum only when $\hat{p}$ =0.5. (For any other value of $\hat{p}$ , we will get a value less than 0.25. For example if, $\hat{p}$ is 0.4, then $1-\hat{p}=0.6$ and thus, $\hat{p}(1-\hat{p})=0.24$ .).

We will now use the formula

$n=(\frac{Z_{Critical}}{E})^2\hat{p}(1-\hat{p})$

We will now substitute all the data that we have and we will get

$n=(\frac{1.645}{0.05})^2\times0.5(1-0.5)$

$n=(32.9)^2\times0.25$

$n=270.6025$

which can approximated to n=271.

So, the brand manager needs a sample size of 271

3 0

3 years ago

The local sports shop has backpacks on sale for $28. The original price was $40. What is the percent decrease for the backpack p

emmainna [20.7K]

30%. 40-28 =12. 12/40 =30%

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3 years ago

Translate the equation using a variable. "Nineteen less than one-half of a number is -13."

Illusion [34]

Answer:

1/2a-19=-13

Step-by-step explanation:

One half of a number represents the phrase "1/2a" (in this case the variable/number is 'a'". Then because it says "nineteen less than", that means you subtract 19 from one half of the variable.

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3 years ago

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Which of the following most closely represents a Democratic Party viewpoint?

FrozenT [24]

Answer: Government should provide additional resources to help low income families

Step-by-step explanation:

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3 years ago