2 years ago

Hello please help i’ll give brainliest but you gotta answer correctly

Mathematics

1 answer:

Mrrafil [7]2 years ago

8 0

Answer:

the second one

Step-by-step explanation:

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The ratio of boys to girl at the dance was 9 to 5.how many girls were at the dance if there were 85 girls ar the dance

liq [111]

Answer:

153

Step-by-step explanation:

ans.

5x=85

x =85÷5

=17

9x=17x9

=153

6 0

2 years ago

Part A; <br> Part B; <br> Part C;

pychu [463]

15 16 and then 17 to be an equilateral

8 0

3 years ago

2350 million in standard form

topjm [15]

Answer:

in this problem we have

2,350 million

Remember that

1 million=1,000,000

2,350 million=2,350*1,000,000=2,350,000,000

convert to standard form

2,350,000,000=2.35*10^{9}

therefore

the answer is

2.35*10^{9}

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

Sarah is doing research on the average age of first-year resident physicians. She wants her estimate to be accurate to within 1

WINSTONCH [101]

Answer: The number of first-year residents she must survey to be 95% confident= 263

Step-by-step explanation:

When population standard deviation ( $\sigma$ ) is known and margin of error(E) is given, then the minimum sample size (n) is given by :-

$n=(\dfrac{z^*\sigma}{E})^2$ , z* = Two-tailed critical value for the given confidence interval.

For 95% confidence level , z* = 1.96

As, $\sigma$ = 8.265, E = 1

So, $n= (\dfrac{1.96\times8.265}{1})^2 =(16.1994)^2\\\\= 262.42056036\approx263\ \ \ [\text{Rounded to the next integer}]$

Hence, the number of first-year residents she must survey to be 95% confident= 263

7 0

2 years ago

Plz need help for a grade god explanation and answer get brainliest

Ivanshal [37]

Answer:

20%

Step-by-step explanation:

There is a 20% chance you get selected for researching China because 5 out of 25 spaces are ones for researching China.

$\frac{5}{25} =\frac{20}{100}$

3 0

2 years ago