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GenaCL600 [577]
4 years ago
13

The U.S. Census Bureau conducts a study to determine the time needed to complete the shortform. The Bureau surveys 200 people. T

he sample mean is 8.2 minutes. There is a knownstandard deviation of 2.2 minutes. The population distribution is assumed to be normal.Identify the following:x¯= _____σ= _____n= _____
Mathematics
1 answer:
pychu [463]4 years ago
8 0

Answer:

Step-by-step explanation:

Download docx
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Insert five geometric means between 1/8 and 8. There are supposed to be 2 answers
AnnyKZ [126]

Answer:

Step-by-step explanation:

In a geometric sequence, the consecutive terms differ by a common ratio. The formula for determining the nth term of a geometric progression is expressed as

Tn = ar^(n - 1)

Where

a represents the first term of the sequence.

r represents the common ratio.

n represents the number of terms.

From the information given,

a = 1/8

n = 7 terms

Since the last term is 8, then

8 = 1/8 × r^(7 - 1)

Multiplying through by 8, it becomes

64 = r^6

Taking the 6th root of both sides of the equation, then

r = 2

The 5 geometric means would be

1/8 × 2 = 1/4

1/4 × 2 = 1/2

1/2 × 2 = 1

1 × 2 = 2

2 × 2 = 4

The sequence is

1/8, 1/4, 1/2, 1, 2, 4, 8

8 0
4 years ago
PLEASE HELP I WILL GIVE BRAINLIEST!!!
Komok [63]

Answer: I got the answer for the 17. question And its D

Step-by-step explanation: Bc i am 100% sure its right.

8 0
3 years ago
Read 2 more answers
Jessica is walking home from a friend’s house. After 2 minutes she is 1.4 miles from home. Twelve minutes after leaving, she is
jonny [76]

let's say 12 min - 2 mins = 10 mins

and 1.4 mile - 0.9 miles = 0.5 miles

Jessica takes 10 mins to walk a distance of 0.5 miles

=> 10 mins*6 = 60 mins = 1 hour

=> 0.5 miles*6 = 3 miles

her rate is 3 miles per hour

5 0
3 years ago
Read 2 more answers
A state park is designed in a circular pattern as shown. Martha rides her bike along the circular path from the ranger station t
Alex Ar [27]

C. 2.3 miles

Step-by-step explanation:

The details of the image are as follows;

Ranger station to Nature Center = 90°

Nature center to petting zoo= 40°

Petting zoo to Tennis court =120°

Tennis court to Pool = 65°

Pool to Ranger station= 45°

The radius of the circular pattern = 1 mile

The formula to apply is;

Arc length = 2πr angle / 360° where r is radius and π=3.14

Finding arc length from Ranger Station to Nature Center will be;

Arc length = 2×3.14×1×90°/360°

Arc length=2×3.14×1×1/4 =1.57 miles

Finding distance from Nature Center to Petting Zoo

Arc length= 2×3.14×1×40°/360°

Arc length= 2×3.14×1×1/9 = 0.70 miles

Total =1.57+0.70 =2.27 miles

Answer to the nearest hundredth = 2.3 miles

Learn More

Arc length : brainly.com/question/11692709

Keywords : circular , pattern, path, hundredth

#LearnwithBrainly

4 0
3 years ago
a ball is thrown into the air with a velocity of 40 ft/s, its height in feet seconds later is given by y=40t-16t^2. a) Find the
Scorpion4ik [409]
V(t) = dy/dt = 40 - 32t
ai). average velocity = (v(0.5) - v(0))/(0.5 - 0) = ((40 - 32(0.5)) - (40 - 32(0)))/0.5 = (40 - 16 - 40)/0.5 = -16/0.5 = -32m / s

ii). average velocity = (v(0.1) - v(0))/(0.1 - 0) = ((40 - 32(0.1)) - (40 - 32(0)))/0.1 = (40 - 3.2 - 40)/0.1 = -3.2/0.1 = -32m / s

iii). average velocity = (v(0.05) - v(0))/(0.05 - 0) = ((40 - 32(0.05)) - (40 - 32(0)))/0.05 = (40 - 1.6 - 40)/0.05 = -1.6/0.05 = -32m / s
5 0
4 years ago
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