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Fofino [41]
3 years ago
13

PLEASE PLEASE PLEASE I ALMOST DONE AND I NEED THIS QUESTION

Mathematics
1 answer:
sukhopar [10]3 years ago
6 0

Answer:

107

Step-by-step explanation:

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At blood drive, 5 donors with type O+ blood, 5 donors with type A+ blood, and 2 donors with type B+ blood in line. In how many d
neonofarm [45]

Answer: I think 8

I am Not sure hope this helps though

Step-by-step explanation:

4 0
3 years ago
Find the volume of a right circular cone that has a height of 12 m and a base with a diameter of 8.9 m. Round your answer to the
steposvetlana [31]

Volume of Cone

Volume of the right circular cone is  248.7 m³

Step-by-step explanation:

A right circular cone is a three dimensional geometrical object. Right circular cone is a circular cone whose axis is perpendicular to its base. The slant height is the length of an element. All elements of a right circular cone  are all equal.

The volume of the right circular cone is defined as  1/3 \pi r^{2}h

where r is radius of the cone and h is the height of the cone

V =  1/3 \pi r^{2}h

Given diameter d  = 8.9 m

So the radius r = 8.9 ÷ 2 = 4.45 m

V = (1/3) × 3.14 × (4.45)²  × 12

= (1/3) × 3.14 × 19.80 × 12

= 248.69 m³

Hence the Volume of the right circular cone is  248.7 m³

4 0
3 years ago
Read 2 more answers
Point O is a centroid of the triangle LMN. If OM=38 cm, what is MP?
Yuri [45]

9514 1404 393

Answer:

  c.)  57 cm

Step-by-step explanation:

The centroid divides the median into parts with a 2:1 ratio.

  OM : OP = 2 : 1

  OM : MP = 2 : (2+1) = 2 : 3

As a fraction with MP on top, this is ...

  MP/OM = 3/2

  MP = (3/2)OM = 3/2×(38 cm)

  MP = 57 cm

__

<em>Comment on the answer choices</em>

Often, you can eliminate a number of the choices in a multiple-choice question just by testing whether they are reasonable. Here, the longer part of a line segment has length 38, so the whole segment will not be shorter than that. The choices 19 and 25.5 make no sense.

The remaining choices are 114 cm and 57 cm. The former is 3 times the length of the given segment, which the drawing tells us is unreasonable.

The only reasonable choice offered is 57 cm.

8 0
3 years ago
A research scientist wants to know how many times per hour a certain strand of bacteria reproduces. He wants to construct the 95
Galina-37 [17]

Answer:

The minimum sample size required for the estimate is 345.

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1 - 0.95}{2} = 0.025

Now, we have to find z in the Ztable as such z has a pvalue of 1 - \alpha.

That is z with a pvalue of 1 - 0.025 = 0.975, so Z = 1.96.

Now, find the margin of error M as such

M = z\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

The standard deviation is known to be 1.8.

This means that \sigma = 1.8

What is the minimum sample size required for the estimate?

This is n for which M = 0.19. So

M = z\frac{\sigma}{\sqrt{n}}

0.19 = 1.96\frac{1.8}{\sqrt{n}}

0.19\sqrt{n} = 1.96*1.8

\sqrt{n} = \frac{1.96*1.8}{0.19}

(\sqrt{n})^2 = (\frac{1.96*1.8}{0.19})^2

n = 344.8

Rounding up to the next integer:

The minimum sample size required for the estimate is 345.

8 0
3 years ago
Here is the base of a prism.
IceJOKER [234]
She did it right ^^^^^
3 0
3 years ago
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