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2 years ago

Help, Im not smart and I don't get this.

Mathematics

1 answer:

daser333 [38]2 years ago

8 0

Answer:

The number of students enrolled at a college is 18,000 and grows 3% each year. Complete parts (a) through (e).

a) The initial amount a is 18,000.

b) The percent rate of change is 3%, so the growth factor b is 1 + 0.03 = 1.03.

c) To find the number of students enrolled after one year, you calculate 18,000 · 1.03.

d) Complete the equation y = 18000 · 1.03^2 to find the number of students enrolled after x years.

e) Use your equation to predict the number of students enrolled after 21 years.

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A researcher wishes to estimate, with 9090% confidence, the proportion of adults who have high-speed Internet access. Her es

Sunny_sXe [5.5K]

Answer: a) Required minimum sample size= 219

b) Required minimum sample size= 271

Step-by-step explanation:

As per given , we have

Margin of error : E= 5% =0.05

Critical z-value for 90% confidence interval : $z_{\alpha/2}=1.645$

a) Prior estimate of true proportion: p=28%=0.28

Formula to find the sample size :-

$n=p(1-p)(\dfrac{z_{\alpha/2}}{E})^2\\\\=0.28(1-0.28)(\dfrac{1.645}{0.05})^2\\\\=218.213856\approx219$

Required minimum sample size= 219

b) If no estimate of true proportion is given , then we assume p= 0.5

Formula to find the sample size :-

$n=0.5(1-0.5)(\dfrac{z_{\alpha/2}}{E})^2\\\\=0.25(\dfrac{1.645}{0.05})^2\\\\=270.6025\approx271$

Required minimum sample size= 271

8 0

2 years ago

Please solve for brainlist

laiz [17]

Answer:

E=10.75h-6.5

Step-by-step explanation:

10.75h for every hour she work

-6.5 for the bus fare

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2 years ago

PLEASE HELP I DONT KNOW HOW TO DO THIS

sergij07 [2.7K]

Answer:

step by step

Step-by-step explanation:

where

r = radius

h= height

Area of a cylinder = 2πrh+2πr^2

Area of a cylinder = 2π8(3)+2π8^2

Area of a cylinder = 176π = 552.92

Area of a hemisphere= 3r2π

Area of a hemisphere= 3(2)2π

Area of a hemisphere= 12π = 37.699111843

Area of the cylinder in this problem

176π - 12π = 164π

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3 years ago

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Arturiano [62]

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Range: 2 because (60-58)

Median: 53 because its in the middle of all the numbers

Mode : None

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3 years ago

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cluponka [151]

Answer: Yes

Step-by-step explanation: Calculator

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3 years ago