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Blizzard [7]
3 years ago
11

Assume that random guesses are made for nine multiple choice questions on an SAT​ test, so that there are nequals9 ​trials, each

with probability of success​ (correct) given by p equals 0.35. Find the indicated probability for the number of correct answers. Find the probability that the number x of correct answers is fewer than 4.

Mathematics
1 answer:
Marina86 [1]3 years ago
6 0

Answer:  Find the probability that the number x of correct answers is fewer than 4 = 0.6087

Step-by-step explanation: Please find the attached files for the solution

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A potato gun is a device made out of plastic pipe that launches a potato using compressed air. They can be great fun, and even e
snow_tiger [21]

Answer:

The potato is 224 feet in the air after 2.75 second on the way up and after 5 seconds on the way back down.

Step-by-step explanation:

Given :  A potato launched by a particular potato gun has a height described by  h ( t ) =-16 t^2+124 t+4.

To find : When is the potato 224 feet in the air?

Solution :

When the potato is 224 feet in the air i.e. h(t)=224

Substitute in the equation h ( t ) =-16 t^2+124 t+4,

224=-16 t^2+124 t+4

16t^2-124 t+220=0

4t^2-31t+55=0

Applying quadratic formula, x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}

Here, a=4, b=-31 and c=55

t=\frac{-(-31)\pm\sqrt{(-31)^2-4(4)(55)}}{2(4)}

t=\frac{31\pm\sqrt{81}}{8}

t=\frac{31\pm9}{8}

t=\frac{31+9}{8},\frac{31-9}{8}

t=5,2.75

The potato is 224 feet in the air after 2.75 second on the way up and after 5 seconds on the way back down.

5 0
3 years ago
Solve the equation: x+33=40
11Alexandr11 [23.1K]
The answer would be 7. Another way to think of it is subtract 40-33. That gets you 7.
6 0
3 years ago
PLEASE HELP ME ASAP!! I had trouble with this and it is now over due
erica [24]

Answer:

Shira: x = 8

Samuel: m = 0

Step-by-step explanation:

Shira's mistake was that she subtracted 2 from both sides instead of adding to on both sides.

Correct Solving:

2x - 2 = 14

Add 2 to both sides;

2x = 16

Divide both sides by 2;

x = 8

Samuel's mistake was that when he distributed -2 to 8m and 8 he put the wrong sign for -2 * 8.

Correct Solving:

-2(8m + 8) = -16

Distribute;

-16m - 16 = -16

Add 16 to both sides;

-16m = 0

Divide both sides by -16;

m = 0

3 0
3 years ago
The area of a bathroom floor is 24 square feet. If the width of the bathroom is 6 feet, what is the length of the bathroom?
natka813 [3]
L= WxH try that formula
8 0
3 years ago
Read 2 more answers
at a conference of 250 people, 30% of the participants are french, 35% are americans, 20% are germans, and the rest are of the o
Lady bird [3.3K]
Ok...we got 250 people
30% are French, 35% are Americans, 20% are Germans....thats 85%.
This means 15% are from other countries

3 not from other countries...
0.85 * 0.85 * 0.85 = 0.6

0.6(250) = 150 students <===
5 0
3 years ago
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