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algol [13]
3 years ago
14

HELP !!!! I NEED HELP ON THIS QUESTION !!!

Mathematics
1 answer:
lord [1]3 years ago
3 0
Find the volumen of the semisphere and subtract the volumes of the two cylinders

1) Volume of the semisphere:

[1/2] (4/3)π(r^3) =[ 2π(1.5m)^3 ]/3 = 7.0686 m^3

2) Volumen of the cylinders:π(r^2)h

a) π(0.75/2m)^2 (1.75m) = 0.7731 m^3

b) π(1/2m)^2 (1.25m) = 0.9818 m^3

3) 7.0686 m^3 - 0.7731 m^3 - 0.9818m^3 = 5.3137 m^3

Answer: 5.3 m^3

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The sum of two numbers is 16. their difference is 1. what is the product of the two numbers
Fofino [41]

Answer:

The product of the numbers is 63.75

Step-by-step explanation:

Let the numbers be x and y

x + y = 16

x -y = 1

Adding both together

2x = 17

x = 17/2

x = 8.5

Recall

x -y = 1

8.5 - y = 1

y = 8.5 - 1 = 7.5

Their product is xy

so we have 7.5 * 8.5 = 63.75

3 0
2 years ago
You want to know the type of music listened to by 15- to 20-year-olds. Which of the following surveys is biased?
Liula [17]
 Arguably, all of them are at least somewhat biased, but the most biased would be <span>surveying people 15 to 20 years old leaving a concert </span>  because being at a concert would be highly correlated with liking the type of music played at that concert.
6 0
3 years ago
The ratio of the number of dolls Jacky had to the number of dolls Peter had was 5:2 but, after Jacky gave 15 dolls to Peter, the
sleet_krkn [62]

Answer:

70 dolls

Step-by-step explanation:

Hello!

The ratio is 5:2, which are division of  a whole. They can be represented as 5x and 2x.

Jacky has 5x dolls, and Peter has 2x dolls. They were equal after subtracting 15 dolls from 5x and adding them to 2x.

Equation:

  • 5x - 15 = 2x + 15

Solve:

  • 5x - 15 = 2x + 15
  • 5x - 30 = 2x
  • 5x = 2x + 30
  • 3x = 30
  • x = 10

So Jacky has 5(10) dolls, or 50 dolls, and Peter has 2(10) or 20 dolls.

The total sum is 70 dolls.

4 0
2 years ago
Read 2 more answers
Based on the dotplot of the simulation results and the
Sonbull [250]

Answer:

The conclusion to be drawn is:

The actual proportion of teenagers who do not smile  is only 8%.  It is clear that exactly 6 out of 10 teenagers will smile  in their driver's license photo.

If we continued to take more samples of 10  teenagers, the center of the distribution would shift to

Step-by-step explanation:

4 0
3 years ago
There are 250 students taking band, chorus, or both. If there are 180 students taking band and 60 students in both band and chor
katrin2010 [14]

I think your answer here would be 70.


8 0
3 years ago
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