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
shusha [124]
3 years ago
11

Question 15 of 40

Mathematics
1 answer:
PilotLPTM [1.2K]3 years ago
4 0

Answer:

Option C: n = 32; p^ = 0.4

Step-by-step explanation:

The normal curve can be used in this case if; np ≥ 10 or n(1 - p) ≥ 10

A) For n = 28 and p = 0.3;

np = 28 × 0.3 = 8.4 < 10

Thus, it can't be used.

B) For n = 28 and p = 0.9;

np = 28 × 0.9 = 25.2 > 10 Ok

n(1 - p) = 28(1 - 0.9) = 2.8 Not Ok

Thus, it can't be used

C) For n = 32 and p = 0.4

np = 32 × 0.4 = 12.8 > 10 Ok

n(1 - p) = 32(1 - 0.4) = 19.2 > 10 Ok

Thus, it can be used

D) For n = 32 and p = 0.2

np = 32 × 0.2 = 6.4 < 10 Not Ok

Thus it can't be used.

You might be interested in
Solve each compound inequality. Graph your solutions.<br> 5 + m &gt; 4 or 7m&lt; -35
Yuliya22 [10]

Answer:

Solving the inequality 5 + m > 4\: or\: 7m< -35 we get \mathbf{m>-1\:or\: \:m

The graph of the inequality is shown in figure attached.

Step-by-step explanation:

We need to Solve each compound inequality 5 + m > 4\: or\: 7m< -35

Solving the inequalities

For solving compound inequalities we solve both inequalities simultaneously and find the value of m.

For solving 5+m > 4, we subtract 5 from both sides.

While solving 7m < -35, we divide both sides by 7 to get value of m

Applying these functions we get:

5 + m > 4\: or\: 7m< -35\\m>4-5\:or\:m-1\:or\:m

So, solving the inequality 5 + m > 4\: or\: 7m< -35 we get \mathbf{m>-1\:or\: \:m

The graph of the inequality is shown in figure attached.

5 0
2 years ago
Jeff and Brett both play basketball at the country club. Jeff is a
Jet001 [13]

Answer:

8 times

Step-by-step explanation:

2 x 8 = 16

64 + 16 = 80

10 x 8 = 80

5 0
3 years ago
The plan for the Thorne’s backyard play area, shaped like a trapezoid, is shown. The area of the play area is 286.56 square feet
lorasvet [3.4K]

The length of material needed for the border is the perimeter of the backyard play area

<h3>How to calculate the length of material needed </h3>

The area of the play area is given as:

Area = 286.56

The area of a trapezoid is calculated using:

Area = 0.5 * (L1 + L2) * H

Where L1 and L2, are the parallel sides of the trapezoid and H represents the height.

The given parameter is not enough to solve the length of material needed.

So, we make use of the following assumed values.

Assume that the parallel sides are: 25 feet and 31 feet long, respectively.

While the other sides are 10.2 feet and 8.2 feet

The length of material needed would be the sum of the above lengths.

So, we have:

Length = 25 + 31 + 10.2 + 8.2

Length = 74.4

Using the assumed values, the length of material needed for the border is 74.4 feet

Read more about perimeters at:

brainly.com/question/17297081

6 0
2 years ago
Your family went on a road trip. They drove for 12 hours in one day. Your mom drove 5 / 6 of that time. How much of the time did
Viefleur [7K]

Answer:

10

Step-by-step explanation:

The first thing you do is:

12 % 6 = 2

Then you have to:

2 x 5 = 10

You divide the denominator then multiply it by the Numerator

7 0
3 years ago
3x - 1/5= x+1/3 Could you please solve this as soon as possible
VARVARA [1.3K]

x = 0.27

:)

good luck

4 0
3 years ago
Other questions:
  • What is the unit rate of 6 2/5 revolutions in 2 2/3 seconds
    10·2 answers
  • The prime factorization of a number is 23 times 32 times 5. Which is a new statement about the factors of the number?
    15·1 answer
  • Use the formula to determine the area of squares with side lengths of 3 cm, 10.5 cm, and π cm.
    5·1 answer
  • carson has only $20 bills and$10 bills in her wallet. the total vale of the bill is $50. she has 1 more $20 bill then $10 bills.
    10·1 answer
  • A scientist investigates a new substance and finds that at 35° C, 146.2 grams will dissolve in 200.0 grams of water. Which simil
    6·1 answer
  • Does anybody know the answer to this equation???<br> // PLEASE ANSWER //
    12·1 answer
  • Please answer fast...............
    12·1 answer
  • PLZZZ HELP ME I WILL GIVE BRAINLY
    6·2 answers
  • Plz help me it says show work to I’m confused
    11·2 answers
  • Which statements are true about the graph of Y is less than 2/3 X +1? Check all that apply
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!