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Vsevolod [243]
3 years ago
8

Anyone wanna help me?

Mathematics
2 answers:
spayn [35]3 years ago
8 0
Similarities: same atomic number
Differences: they have a different number of neutrons
trasher [3.6K]3 years ago
5 0
I just need to answer a question sorry this didn’t help:)
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MAX POINTS PLEASE HELP BRAINLIEST FOR CORRECT ANSWER W/ EXPLANATION
maksim [4K]

Answer:

(f o g)(-2)= 11

Step-by-step explanation:

6 0
3 years ago
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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
A side of a square is 8 3/2  inches. Using the area formula A = s2, determine the area of the square.
Sedaia [141]
We are given that:
side length = 8 3/2 inches = 9.5 inches
the rule for the area is: A = s^2

Substitute with the side length in the rule given to get the area as follows:
Area = s^2 = (9.5)^2 = 90.25 inch^2
4 0
3 years ago
Kristen and melissa spent 35% of their $32 on movie tickets. how much money did they spend
Ostrovityanka [42]

Answer:

11.2$

Step-by-step explanation:

Kristina and Melissa had 32$ at total

● 32$ => 100%

They have spent 35%

Let x be that amount

● x => 35%

●32 => 100

● x => 35

● x = (35×32)/100 = 11.2$

They have spent 11.2$

3 0
3 years ago
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Given a=5 b=12 c=13 5²+12²=13²
Advocard [28]

Answer:

a^2+b^2=a(2)^1.5

Step-by-step explanation:

im not sure, just seems right

4 0
3 years ago
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