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tangare [24]
3 years ago
11

A bag contains 5 blue marbles, 2black marbles ,and 3 red marbles. A marine is randomly drawn from the bag The probability of not

drawing a black marble is___ . The probability of drawing a red marble is____
Mathematics
1 answer:
notka56 [123]3 years ago
6 0

Answer:

80%; 30%

Step-by-step explanation:

There is 5 blue marbles, 2 black marbles, and 3 red marbles. In other words, there is a total of 10 marbles.

There are only 2 black marbles and 8 marbles that are not black. Therefore, the probability of <em>not</em> drawing a black marble is 8/10 or 4/5 or 80%.

There are only 3 red marbles out of the 10 total marbles. Therefore, the probability of drawing a red marble is 3/10 or 30%.

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A bracelet is exactly 6.97 cm across from one side to the other, through the center. What is the approximate area of the bracele
Vadim26 [7]

Answer:

≈ 38.14 cm²

Step-by-step explanation:

Diameter of circle= 6.97 cm

Area of circle = ?

  • Area = πr² = πd²/4 =
  • 3.14*(6.97)²/4 ≈ 38.14 cm²
3 0
3 years ago
Find the surface area of the figure
IgorLugansk [536]

Answer:

Area of a Square it base x height so 4x4=16+16 = 32 in^2

Step-by-step explanation:

3 0
3 years ago
Find all the missing elements:
pentagon [3]

Answer:

B = 34.2°

C = 58.2° or 121.8°

c= 10.6

Step-by-step explanation:

Step 1

Finding c

We calculate c using Pythagoras Theorem

c²= a² + b²

c = √a² + b²

a= 8, b = 7

c = √8² + 7²

c = √64 + 49

c = √(113)

c = 10.630145813

Approximately c = 10.6

Step 2

Find B

We solve this using Sine rule

a/sin A = b/sin B

A = 40°

a = 8

b = 7

Hence,

8/sin 40° = 7/sin B

8 × sin B = sin 40° × 7

sin B = sin 40° × 7/8

B = arc sin (sin 40° × 7/8)

B ≈34.22465°

Approximately = 34.2°

Step 3

We find C

Find B

We solve this using Sine rule

b/sin B = c/sin C

B = 34.2°

b = 7

c = 10.6

C = ?

Hence,

7/sin 34.2° = 10.6/sin C

7 × sin C = sin 34.2 × 10.6

sin C = sin 34.2° × 10.6/7

C = arc sin (sin 34.2° × 10.6/7)

C = arcsin(0.85)

C= 58.211669383

Approximately C = 58.2°

Or = 180 - 58.2

C = 121.8°

5 0
2 years ago
Read 2 more answers
What is the correlation coefficient for the data shown in the table?
Leviafan [203]

we know that

<u>The correlation coefficient</u> is a number between -1 and +1 that represent the linear dependence of two variables or sets of data

Using the function CORREL in a excel tool, calculate the correlation coefficient (r)

see the attached table

the correlation coefficient for the data in the table is equal to 1

therefore

<u>the answer is</u>

r=1

7 0
3 years ago
Read 2 more answers
Convert 2.8 radians to degree measure. Round your answer to the nearest hundredth.​
Sergeeva-Olga [200]

Answer:

16.04°

Step-by-step explanation:

2.8 \: rad = x \: degrees \\

1rad × 180/π = 57.296°

x = 2.8 \times  \frac{180}{\pi}  = 16.0428 \\ x = 16.04

8 0
3 years ago
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