1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Allushta [10]
3 years ago
6

The wingspans of Rodrigues fruit bats are normally distributed, with a mean of 82.5 centimeters and a standard deviation of 2.5

centimeters. To the nearest tenth of a percent, what percentage of Rodrigues fruit bats have a wingspan between 77.5 centimeters and 85 centimeters? A) 68.3% B) 73.4% C) 81.5% D) 85.9%
Mathematics
1 answer:
IrinaK [193]3 years ago
6 0
81.5%
i honestly looked at the numbers in the problem
You might be interested in
For questions 2-5, the number of pieces in a regular bag of Skittles is approximately normally distributed with a mean of 38.4 a
aleksley [76]

Answer:

a. -1.60377

b. 0.25451

c. 0.344

d. Option b) 78th

Step-by-step explanation:

The number of pieces in a regular bag of Skittles is approximately normally distributed with a mean of 38.4 and a standard deviation of 2.12.

a)What is the z-score value of a randomly selected bag of Skittles that has 35 Skittles? a) 1.62 b) -1.62 c) 3.40 d) -3.40 e)1.303.

The formula for calculating a z-score is is z = (x-μ)/σ,

where x is the raw score

μ is the population mean

σ is the population standard deviation.

z = 35 - 38.4/2.12

= -1.60377

Option b) -1.62 is correct

b) What is the probability that a randomly selected bag of Skittles has at least 37 Skittles? a) .152 b) .247 c) .253 d).747e).7534. .

z = (x-μ)/σ

Mean of 38.4 and a standard deviation of 2.12.

z = (37 - 38.4)/2.12

= -0.66038

P-value from Z-Table:

P(x<37) = 0.25451

The probability that a randomly selected bag of Skittles has at least 37 Skittles is 0.25451

Option c) .253 is.correct

c) What is the probability that a randomly selected bag of Skittles has between 39 and 42 Skittles? a) .112 b) .232 c) .344 d).457 e).6125.

z = (x-μ)/σ

Mean of 38.4 and a standard deviation of 2.12.

For 39 Skittles

z = (39 - 38.4)/2.12

= 0.28302

Probability value from Z-Table:

P(x = 39) = 0.61142

For 42 Skittles

z = (42 - 38.4)/2.12

= 1.69811

Probability value from Z-Table:

P(x = 42) = 0.95526

The probability that a randomly selected bag of Skittles has between 39 and 42 Skittles is:

P(x = 42) - P(x = 39

0.95526 - 0.61142

0.34384

= 0.344

Option c is.correct

d) What is the percentile rank of a randomly selected bag of Skittles that has 40 Skittles in it? a)82nd b) 78th c) 75th d)25th e)22nd

z = (x-μ)/σ

Mean of 38.4 and a standard deviation of 2.12.

z = (40 - 38.4)/2.12

= 0.75472

P-value from Z-Table:

P(x = 40) = 0.77479

Converting to percentage = 0.77479× 100

= 77. 479%

≈ 77.5

Percentile rank = 78th

7 0
3 years ago
Activity
Gelneren [198K]

Answer:

Okay, so because angles A, B, and C make a triangle and a triangle is 180 degrees. So, because we know both A and B's measurement's, we can figure out the measurement of C. We can find the measurement of angle C by adding angles A and B and subtracting the total by 180 degrees.

Step-by-step explanation:

3 0
2 years ago
Read 2 more answers
The function g(x) = 2x2 – 28x + 3 written in vertex form is g(x) = 2(x – 7)2 – 95. Which is one of the transformations applied t
mote1985 [20]
<span>3)shifted right 7 units</span>
3 0
2 years ago
Read 2 more answers
What is the true solution to the logarithmic equation?<br>log2 [log2(sqrt4x)]=1​
erastova [34]

Answer:4

Step-by-step explanation:

log₂[log₂(√4x)] = 1

log₂2 =1

So we replace our 1 with log₂2

log₂[log₂(√4x)] = log₂2

log₂ on bothside will cancel each other.

We will be left with;

[log₂(√4x)] = 2

log = power of exponential

√4x = 2²

√4x = 4

Square bothside

(√4x)² = 4²

4X = 16

Divide bothside by 4

4x/4 = 16/4

x = 4

8 0
3 years ago
Read 2 more answers
Pls answer a,b,2,3,4
MArishka [77]

The writing isnt so clear to me
3 0
2 years ago
Other questions:
  • Which property justifies the following statement AB ≅ AB
    10·1 answer
  • What is number 2 need help kinda confused
    6·1 answer
  • Please help ASAP please help
    9·1 answer
  • If any two points can be connected by a line, how can you find the distance between two points connected by a line?
    14·1 answer
  • 6 to the 4th power times 6 to the 4th power
    7·2 answers
  • 2. Ross started walking his dog'at 3:15.
    6·1 answer
  • A tire rim has a diameter of 15 in. What is the circumference of the tire rim? Use 3.14 for Pi.
    9·1 answer
  • Special right triangle! PLEASE HELP!
    15·1 answer
  • Pretty easy middle school math
    5·1 answer
  • 2+2=?
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!