MATHEMATICS MIDDLE SCHOOL

The radius of a circle is 5cm. use 3.14 for pie. find the area

Answers

Answer 1
Answer:

Answer:

The area is 78.5398

Step-by-step explanation:

Formula for area of a circle is \pi r^(2).

Plug in the figures and you get your answer.

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A box contains 6 yellow, 2 black and b4 green pencils. What is the probability of pulling two green pencils (without replacement)?

Answers

4 out of 12 before pulling out two green pencils.
2 out of 10 after pulling out two green pencils.

18/48 as it's simplest form?

Answers

(18)/(48)=(3\cdot6)/(8\cdot6)=(3)/(8)
that would be 3/8 as you cancel down the fractions

grant starteda marathon at 8:00 A.M. he took 4 hours 49 minutes to complete the marathon. when did he crosd the finish line

Answers

If he starts at 8:00 AM and you start counting up by 1 hour at a time...

8:00 - 9:00 = 1 hour
9:00 - 10:00 = 1 hour
10:00 - 11:00 = 1 hour
11:00 - 12:00 = 1 hour

So far that is 4 hours that have passed and we are up to 12:00.  Now remember, when we reach 12:00 we switch from AM to PM (that's 12 noon). 

We only have 49 minutes left so now we just add that in

12:49 PM is when he crossed the finish line.

Someone rolls a six sided fair die 5 times. They consider it a success if they have a two or three on a die. Whats the probability of 2 successes? no successes? and at least 3 successes?

Answers

Answer:

2 successes =  80/243

0 successes = 32/243

at least 3 successes = 51/243

Step-by-step explanation:

Lets suppose we had the following sequence of 5 throws:-

2 or 3,  2 or 3 ,  then NOT 2 or 3 on last 3 throws

Probability of this is

1/3 * 1/3 * 2/3 * 2/3 * 2/3 = 8/243

There are  (5*4) / 2 = 10 ways of having this result  ( that is the number of combinations of 2 from  5   =  5C2 ).

So Prob(2 successes) = (8/243) * 10  = 80/243

Prob ( No successes) =  (2/3)^5 = 32/243

Probability of 3 successes = 1/3 * 1/3 * 1/3 * 2/3 * 2/3 *   5C3  

4/243 * 10 = 40 / 243

Probability of 4 successes =  (1/3)^4 * 2/3 * 5C4

= 10/243

Probability of 5 success = (1/3)^5 = 1 / 243

Prob(at least 3 successes) = 51/243

Answer:

2 successes =  80/243

0 successes = 32/243

at least 3 successes = 51/243

Step-by-step explanation:

Lets suppose we had the following sequence of 5 throws:-

2 or 3,  2 or 3 ,  then NOT 2 or 3 on last 3 throws

Probability of this is

1/3 * 1/3 * 2/3 * 2/3 * 2/3 = 8/243

There are  (5*4) / 2 = 10 ways of having this result  ( that is the number of combinations of 2 from  5   =  5C2 ).

So Prob(2 successes) = (8/243) * 10  = 80/243

Prob ( No successes) =  (2/3)^5 = 32/243

Probability of 3 successes = 1/3 * 1/3 * 1/3 * 2/3 * 2/3 *   5C3  

4/243 * 10 = 40 / 243

Probability of 4 successes =  (1/3)^4 * 2/3 * 5C4

= 10/243

Probability of 5 success = (1/3)^5 = 1 / 243

Prob(at least 3 successes) = 51/243

ocelyn is going to put wood floors down in her living room. the room 24 feet long and 15 feet wide , how maNY square feet of wood does Jocelyn need

Answers

Jocelyn needs 360 square feet of wood to cover her living room.

What is the area of the rectangle?

The area of a rectangle is defined as the product of the length and width.

The area of a rectangle = L × W

Where W is the width of the rectangle and L is the length of the rectangle

To determine the total square footage of the living room, we need to multiply the length by the width:

Area of living room = length x width

= 24 ft x 15 ft

Apply the multiplication operation, and we get

= 360 sq ft

Therefore, Jocelyn needs 360 square feet of wood to cover her living room.

Learn more about the area of the rectangle here:

brainly.com/question/20693059

#SPJ3
The perimeter would be 39 feet. The area would be 360 feet. I'm not sure which will be appropriate for this question (you decide).

Amit buys a pair of jeans for$33. He must pay 7% salestax. He gives the cashier$40. How much changedoes he receive back?

Answers

The 7% sales tax is $2.31. Add that to the $33 to get $35.31. 40-35.31 is 4.69 so the change back is $4.69.
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