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Vikki [24]
3 years ago
14

Please help with any you can, i will give brainliest.

Mathematics
1 answer:
mina [271]3 years ago
7 0

Answer:

11.4

Step-by-step explanation:

7b))60+40+x=180

x=180-100

x=80

sin60÷10=sin80÷x

xsin60=10sin80

x=10sin60÷sin60

=11.371

=11.4

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Steve wants to know what the average ACT scores of students graduated from his high school is. He randomly selected 25 students
beks73 [17]

Answer:

[a]. sample is 25 randomly selected students

    also population is all students

[b]. (20.0, 23.0)

[c]. (8.8, 24.2)

Step-by-step explanation:

here is a step by step process to solving this, i hope you find this helpful.

1). The population is all students who graduated from his school  while the

sample is 25 randomly selected students from the email list

2). given alpha = 1-0.86=0.14

critical z value(two tailed) for 86% confidence level is:

z=normsinv(0.07) or normsinv(0.93)=1.476

Margin of error=1.476*(4.6/SQRT(20))=1.5

86% confidence interval for population mean

=21.5+/-1.5

=(20.0, 23.0)

3). if population standard deviation is not known,we will use t distribution.

df=20-1=19

t*=tinv(0.05,19)=2.093

Margin of error=2.093*(5.7/sqrt(20))=2.7

95% confidence interval for population mean

=21.5+/-2.7

=(18.8, 24.2)

cheers i hope this helps!!!!

3 0
3 years ago
The minimum wage is increased by 1.7%. It was originally £6.10. How much is the minimum wage now?
Rus_ich [418]
It would be 7.80 , just add 6.10 +1.7 hope this helps
7 0
3 years ago
Tyrone invested money for 3 years at 5% interest. If the interest paid was $60, how much money was invested? What was the total
yan [13]

Answer:

He invested $1200 and had a balance of $1260 after 3 years.

3 0
3 years ago
4x + 11 = 15 what is an equivalent equation for each given equation
slavikrds [6]
I can solve it?

take away 11 from both sides to make..
4x = 4
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3 0
3 years ago
Read 2 more answers
A square pool is surrounded by a paved area that is 2 metres wide. If the area of the paving is 72m2, what is the length of the
likoan [24]

The length of the square pool is 8. 49cm

<h3>How to determine the area</h3>

Note that the formula for finding the area of a square is given as;

Area = length^2

We have

Area = 72 m²

Substitute into the formula

I^2 = 72

Find the square root of both sides

I= √72

I = 8. 49cm

The length of the square pool given as I is 8. 49cm

Thus, the length of the square pool is 8. 49cm

Learn more about area of a square here:

brainly.com/question/486778

#SPJ1

5 0
2 years ago
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