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NNADVOKAT [17]
3 years ago
6

Assume that random guesses are made for eight multiple choice questions on an SAT test so that there are n =8 trials ,each with

probability of success (correct) given by p=0.2. find the indicated probability for the number of correct answer.
find the probability that the number x or correct answer is fewer than 4​
Mathematics
1 answer:
True [87]3 years ago
4 0

Step-by-step explanation:

consider k the numbe of correct answers

P(k) = kC8×(0,2)^k×(0,8)^(8-k)

example:

The probability of having 2 correct answers = 2C8×(0,2)^2×(0,8)^(6) = 0.294

the probability that the number x or correct answer is fewer than 4​ =

p(0) + p(1) + p(2) + p(3) = 0.944

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Please help, algebra 1 unit 4 lesson 1
Fantom [35]
The answer for A. Is Yes. For every number of cups, there is one height in centimeters. The answer for B. Is Yes. Each height in centimeters corresponds to one particular number of cups. Hope this helps.
6 0
3 years ago
A cone with a height of 50 meters has a volume of 5400π meters cubed. What is the radius of the cone?
Sergeu [11.5K]

Answer:

A

Step-by-step explanation:

The volume of a cone has the formula:

V=\frac{1}{3}\pi r^2 h

Where

V is the volume

r is the radius

h is the height

Given,

h = 50

V = 5400π

We want the radius, r.

Lets substitute and solve for r:

V=\frac{1}{3}\pi r^2 h\\5400\pi=\frac{1}{3}\pi r^2(50)\\5400\pi=\frac{50\pi r^2}{3}\\50\pi r^2=16200\pi\\r^2=324\\r=\sqrt{324}\\r=18

The radius is 18 meters

Correct answer A

7 0
3 years ago
What's 454.895 rounded to the nearest cent?????? Please help me!! I just want to make sure I got the answer right.
Nastasia [14]
454.90, the 5 makes the 9 go up which in turn makes the 8 also go up.
3 0
2 years ago
!!!!!!!!! Helppppppp plsssss
Travka [436]

Answer:

(6 / 4) * (7 + 9)

Step-by-step explanation:

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4 0
2 years ago
measure the lines with small paper clips and then with a centimeter ruler. Line 1, has 3 paper clips = 12 cm with ruler. Line 2,
liberstina [14]

Answer:

Its because the paper clips used here are of same length (4cm long).

So the measurements of lines two and three need to be multiples of 4 to me measured accurately with the paper.

i.e Line two needs to be 6cm + 2cm = 8cm (eight is a muliple of 4)

Line three needs to be 9cm + 3cm = 12cm (twelve is a multiple of 4)

Step-by-step explanation:

Since line 1 has 3 paper clips and its 12cm in length, the size of the paper clips is 4cm.

Line 2 is 6cm long and will require two more centimeters to measured accurately by the 4cm-paper clips.

Line 3 is 9cm and will require three more centimeters to be measured accurately by the 4cm-paper clips.

3 0
2 years ago
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