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Olenka [21]
3 years ago
13

Molly has a jar containing 4 yellow, 3 blue, 3 green, and 2 orange marbles

Mathematics
1 answer:
NeTakaya3 years ago
6 0

Answer: .111 with a bar notation over the last 1 or 11.1%

Step-by-step explanation:

There are 12 marbles in total. There are 4 yellow marbles. Therefore there is a 4/12 probability of Randomly picking a Yellow marble the first time . Since she placed the marble back, there is a 4/12 probability of getting a yellow marble the 2nd time.

(4/12)(4/12) = 16/144 = 1/9 = .111 with a bar notation over the last 1 or 11.1% (about 11%)

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A triangular pyramid has a base with an area of 43 cm squared and lateral faces with bases of 10 cm and heights of 8.6 cm. What
Jet001 [13]

Answer:

The total surface area of triangular pyramid is 172 cm squared

Step-by-step explanation:

Triangular pyramid:

  • Number of faces 4.
  • Number of vertices of a triangular pyramid is 6.
  • The volume  is \frac13 AH. A= area of the pyramid's base and H= height of the pyramid.
  • The surface area of triangular pyramid B+L. B= area of base, L= area of lateral surface.

Given that, the area of the base is 43 cm squared. Lateral faces with bases of 10 cm and heights 8.6 cm.

The 3 sides of the triangular pyramid is triangle in shape.

The area of triangle is \frac12 \times base \times height.

The lateral surface area of the triangular pyramid is

=3(\frac12 \times base \times height)

=3(\frac12\times 10\times8.6) cm squared

=129 cm squared

The total surface area of triangular pyramid is

=Area of the base + lateral surface area

=(43+129) cm squared

=172  cm squared

8 0
3 years ago
A 3-mi cab ride cost $7.90. A 9-mi cab ride cost $18.70​
Sauron [17]

Answer:

first part: y=2.63x

second part: y=2.08x

Step-by-step explanation:

1) 7.90 / 3 = 2.633333 (I rounded to 2.63)

2) 18.70 / 9 = 2.07777 (I rounded to 2.08)

I hope this what you were asking

3 0
3 years ago
+ listen
larisa86 [58]

Answer:

$4.99

Step-by-step explanation:

34.93 \div 7

8 0
3 years ago
Read 2 more answers
Can someone please help <br><br> Solve. 2a+3=9
dedylja [7]

Answer:

a = 3

Step-by-step explanation:

9-3=6

6/2=3

8 0
3 years ago
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Total hours worked for Rachel Smiley is ______________. a.) 40 hours 15 minutes b.) 41 hours 25 minutes c.) 41 hours 35 minutes
Usimov [2.4K]

Answer:

b.

Step-by-step explanation:

hope it's help

<h2>to all</h2>
4 0
3 years ago
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